Evaporator and ice cream machine

Abstract

The utility model discloses an evaporator and ice cream machine relates to ice cream machine technical field, wherein, the evaporator includes: inner bucket for holding the medium to be frozen, the outer bucket is set up in the outside of inner bucket, and the both ends of outer bucket are sealedly connected with the both ends of inner bucket respectively to form a heat exchange chamber with inner bucket, and the refrigerant inlet and refrigerant outlet are still equipped with on the outer bucket, and the refrigerant inlet and refrigerant outlet all communicate heat exchange chamber, the flow -guiding structure is located in heat exchange chamber, and the flow -guiding structure is used for guiding the refrigerant flow along the outer wall of inner bucket. The utility model provides technical scheme to improve the refrigeration efficiency and refrigeration effect of ice cream machine.

Description

Technical Field

[0001] This utility model relates to the field of ice cream machine technology, and in particular to an evaporator and an ice cream machine. Background Technology

[0002] Currently, ice cream machine evaporators typically employ a coiled structure, where copper or aluminum evaporator tubes are coiled along the outer wall of the ice cream tub. However, this type of evaporator suffers from low heat exchange efficiency in practical applications. This is due to two main reasons: firstly, the heat transfer path between the refrigerant and the ingredients in the tub must pass through both the evaporator tube wall and the ice cream tub wall, creating at least two layers of metal walls, resulting in high thermal resistance; secondly, the limited contact area between the evaporator tubes and the outer wall of the ice cream tub, along with assembly gaps or air gaps, further increases the heat transfer resistance and reduces the energy efficiency of the refrigeration system. Utility Model Content

[0003] The main purpose of this invention is to provide an evaporator and an ice cream machine, which aims to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model proposes an evaporator for use in an ice cream machine, the evaporator comprising: The inner drum is used to hold the medium to be frozen. An outer tub is fitted over the inner tub, with both ends of the outer tub being sealed to both ends of the inner tub to form a heat exchange chamber. The outer tub is also provided with a refrigerant inlet and a refrigerant outlet, both of which are connected to the heat exchange chamber. A flow guiding structure is provided inside the heat exchange cavity, and the flow guiding structure is used to guide the refrigerant to flow along the outer wall of the inner barrel.

[0005] In one embodiment, the refrigerant inlet is located in the middle of the bottom of the outer tub, and the refrigerant outlet is located at one end of the outer tub away from the bottom.

[0006] In one embodiment, the flow guiding structure includes a first flow guiding portion protruding into the heat exchange cavity, the first flow guiding portion dividing the heat exchange cavity into a first chamber and a second chamber that are connected to each other, the first chamber being opposite to the bottom of the inner barrel, and the second chamber being opposite to the side of the inner barrel.

[0007] In one embodiment, the flow guiding structure further includes a second flow guiding portion, which protrudes from the first cavity and extends around the center of the bottom of the inner barrel, and the second flow guiding portion is provided with a first notch that extends radially through the inner barrel.

[0008] In one embodiment, a plurality of second flow guides are provided, and the plurality of second flow guides are arranged at intervals in the radial direction of the inner barrel.

[0009] In one embodiment, the first notch on the adjacent second guide portion is offset in the circumferential direction of the inner barrel.

[0010] In one embodiment, the flow guiding structure further includes a third flow guiding portion, which protrudes from the second cavity and extends around the side of the inner barrel, and the third flow guiding portion is provided with a second notch that extends through the axial direction of the inner barrel.

[0011] In one embodiment, multiple third guide portions are provided, and the multiple third guide portions are spaced apart along the axial direction of the inner barrel.

[0012] In one embodiment, the second notch on the adjacent third guide portion is offset in the circumferential direction of the inner barrel.

[0013] This utility model also proposes an ice cream machine, including the evaporator described above.

[0014] In the technical solution of this utility model, the inner and outer barrels form a sealed heat exchange cavity and the refrigerant is guided to flow along the outer wall of the inner barrel by the flow guiding structure. This solves the thermal resistance problem of traditional coil evaporators. At the same time, the flow guiding structure can optimize the refrigerant flow path, so that the refrigerant can fully contact the outer wall of the inner barrel, improve the heat exchange efficiency between the refrigerant and the medium to be frozen, shorten the cooling time and reduce energy consumption. Attached Figure Description

[0015] To more clearly illustrate the technical solutions 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 the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the evaporator provided by this utility model; Figure 2 for Figure 1 Cross-sectional schematic diagram of the embodiment; Figure 3 for Figure 1 A schematic diagram of the outer barrel in the embodiment; Figure 4 for Figure 1 Another structural diagram of the outer barrel in the embodiment; Figure 5 This is a schematic diagram of another embodiment of the evaporator provided by this utility model.

[0017] Explanation of icon numbers: 10. Heat exchange chamber; 11. First chamber; 12. Second chamber; 20. Refrigerant inlet; 30. Refrigerant outlet; 100. Inner barrel; 200. Outer barrel; 300. Flow guiding structure; 310. First flow guiding section; 320. Second flow guiding section; 321. First notch; 330. Third flow guiding section; 331. Second notch.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] Existing ice cream refrigeration systems mostly use a structure where copper tube coils are fitted to the ice cream bowl for heat exchange. This has drawbacks such as high cost, complex processing, and high thermal resistance that affects refrigeration performance.

[0023] Therefore, this application proposes an evaporator for an ice cream machine, the evaporator comprising: Inner drum 100, used to hold media to be frozen; The outer barrel 200 is fitted outside the inner barrel 100. The two ends of the outer barrel 200 are respectively sealed and connected to the two ends of the inner barrel 100 to form a heat exchange chamber 10 together with the inner barrel 100. The outer barrel 200 is also provided with a refrigerant inlet 20 and a refrigerant outlet 30, both of which are connected to the heat exchange chamber 10. The flow guiding structure 300 is located inside the heat exchange cavity 10 and is used to guide the refrigerant to flow along the outer wall of the inner barrel 100.

[0024] In the technical solution of this utility model, the inner barrel 100 and the outer barrel 200 form a sealed heat exchange cavity 10, and the flow guiding structure 300 guides the refrigerant to flow along the outer wall of the inner barrel 100, which solves the thermal resistance problem of traditional coil evaporators. At the same time, the flow guiding structure 300 can optimize the refrigerant flow path, so that the refrigerant can fully contact the outer wall of the inner barrel 100, improve the heat exchange efficiency between the refrigerant and the medium to be frozen, shorten the cooling time and reduce energy consumption.

[0025] like Figures 1 to 5 As shown in one embodiment of this application, the evaporator is used in an ice cream machine to process ice cream liquid. The evaporator includes a cylindrical inner barrel 100 and an outer barrel 200 fitted outside the inner barrel 100. The inner barrel 100 is made of stainless steel and is used to hold the ice cream ingredients. The top opening of the inner barrel 100 is used for loading and unloading ice cream. In addition, blades are rotatably arranged inside the inner barrel 100 for stirring, and the bottom opening of the inner barrel 100 is provided for loading the blades. The outer barrel 200 can be made of metal materials such as aluminum alloy or stainless steel. The outer barrel 200 and the inner barrel 100 are... The outer tub 200 is shaped to fit the inner tub 100 and is larger than the inner tub 100. The top of the outer tub 200 is provided with an opening, through which the inner tub 100 can be inserted into the outer tub 200. The edge of the opening of the inner tub 100 and the edge of the opening of the outer tub 200 can be fitted together and sealed by welding, bonding or other means. Correspondingly, the bottom of the outer tub 200 and the bottom of the inner tub 100 can be sealed together by the same connection method. In this way, a closed heat exchange chamber 10 can be formed between the inner tub 100 and the outer tub 200. The heat exchange chamber 10 surrounds the bottom and sides of the inner tub 100.

[0026] In addition, the outer barrel 200 is equipped with a refrigerant inlet 20 and a refrigerant outlet 30. Both the refrigerant inlet 20 and the refrigerant outlet 30 are connected to the heat exchange chamber 10. The refrigerant inlet 20 can be connected to the refrigerant output from the compressor of the ice cream machine, and the refrigerant outlet 30 allows the refrigerant to flow back to the compressor to complete the cycle. With this structure, the refrigerant entering the heat exchange chamber 10 can directly exchange heat with the outer wall of the inner barrel 100, thereby directly cooling the medium to be frozen in the inner barrel 100. This can reduce the thermal resistance between the refrigerant and the medium to be frozen, improve the refrigeration efficiency and refrigeration effect, and thus improve the processing quality and efficiency of ice cream. At the same time, it helps to reduce the energy consumption required for refrigeration and improve the economy of the ice cream machine.

[0027] In addition, a flow guiding structure 300 is provided in the heat exchange chamber 10. The flow guiding structure 300 can be a plate-shaped structure that extends from the bottom of the inner barrel 100 to the side of the inner barrel 100. The extension can be spiral or other shapes. After the refrigerant enters the heat exchange chamber 10 from the refrigerant inlet 20, it can flow along the outer wall of the inner barrel 100 under the guidance of the flow guiding structure 300, which prolongs the residence time of the refrigerant in the heat exchange chamber 10 and makes the refrigerant fully contact the bottom and side of the inner barrel 100. This increases the effective heat exchange area and improves the heat exchange efficiency between the refrigerant and the medium to be frozen. At the same time, the temperature distribution on the outer wall of the inner barrel 100 is more uniform, which is conducive to the uniform cooling and quality control of the ice cream mixture.

[0028] like Figure 2 In another embodiment of this application, the refrigerant inlet 20 is located in the middle of the bottom of the outer barrel 200, and the refrigerant outlet 30 is located at the end of the outer barrel 200 away from the bottom. The refrigerant inlet 20 is located in the middle of the bottom of the outer barrel 200, and the refrigerant outlet 30 is located near the top opening of the outer barrel 200. After the refrigerant enters the heat exchange chamber 10, it first flows through the bottom of the inner barrel 100, then spreads upwards and flows through the side of the inner barrel 100, finally exiting from the refrigerant outlet 30 at the top. This arrangement ensures that the refrigerant first contacts the bottom of the inner barrel 100, and then contacts the side wall. While covering the outer wall of the inner barrel 100 to achieve comprehensive heat exchange, it also enhances the heat exchange effect at the bottom of the inner barrel 100. When processing a small amount of ice cream ingredients, this ensures that the cooling capacity is fully utilized by the ice cream ingredients, avoiding energy waste caused by over-cooling, and better meeting actual usage needs.

[0029] like Figure 3 and Figure 4 In another embodiment of this application, the flow guiding structure 300 includes a first flow guiding part 310 protruding into the heat exchange cavity 10. The first flow guiding part 310 divides the heat exchange cavity 10 into a first chamber 11 and a second chamber 12 that are connected. The first chamber 11 is opposite to the bottom of the inner barrel 100, and the second chamber 12 is opposite to the side of the inner barrel 100.

[0030] The first flow guide 310 can be configured as an annular protrusion structure, which can be located at the edge near the bottom of the inner barrel 100 and can extend around the center of the inner barrel 100. The first flow guide 310 can be connected to one of the inner barrel 100 and the outer barrel 200 and abut against the bottom edge of the other. The first flow guide 310 can divide the heat exchange chamber 10 into a first chamber 11 opposite to the bottom of the inner barrel 100 and a second chamber 12 corresponding to the side of the inner barrel 100. The refrigerant inlet 20 is connected to the first chamber 11 and the refrigerant outlet 30 is connected to the second chamber 12. In addition, a through notch can be provided on the first flow guide 310, which connects the first chamber 11 and the second chamber 12.

[0031] With the above structure, the refrigerant flow path is divided into two stages. In the first stage, the refrigerant is blocked by the first guide section 310 and diffuses at the bottom of the inner barrel 100. When the refrigerant level rises to the notch of the first guide section 310, it enters the second stage, where the refrigerant spreads upward along the side of the inner barrel 100 and completes heat exchange with the side. The refrigerant eventually spreads to the refrigerant outlet 30 and is discharged, starting the next cycle. Through the above technical solution, the refrigerant can fully exchange heat with the bottom of the inner barrel 100 and then diffuse evenly to the side area, ensuring that the entire outer wall of the inner barrel 100 is in full contact with the refrigerant. At the same time, it makes the cooling effect of the refrigerant on the bottom of the inner barrel 100 better. When processing small amounts of ice cream ingredients, this ensures that the cooling capacity is fully utilized by the ice cream ingredients, which is more in line with actual usage needs.

[0032] like Figure 3 and Figure 4 In another embodiment of this application, the flow guiding structure 300 further includes a second flow guiding portion 320, which protrudes from the first chamber 11 and extends around the center of the bottom of the inner barrel 100. The second flow guiding portion 320 is provided with a first notch 321 that passes through the inner barrel 100 radially.

[0033] The second flow guide 320 is configured as a protruding structure extending in a ring around the center of the bottom of the inner tub 100. The two sides of the protruding structure are respectively connected to the outer wall of the inner tub 100 and the inner wall of the outer tub 200. The second flow guide 320 can extend around the center, thereby dividing the first chamber 11 into two concentric independent chambers. In addition, a first notch 321 is provided on the second flow guide 320, which penetrates radially through the inner tub 100. The first notch 321 connects the two chambers mentioned above. The refrigerant inlet 20 connects to the chamber near the center of the bottom of the inner tub 100. Specifically, the refrigerant first enters the central chamber near the bottom of the inner tub 100. Then, restricted by the second guide section 320, the refrigerant spreads within this chamber, cooling the central area of ​​the bottom of the inner tub 100. When the refrigerant reaches the first notch 321, some of it flows radially outward through the notch. The outflowing refrigerant flows in a ring within the outer chamber, continuing to cool the area of ​​the bottom of the inner tub 100 away from the center. Afterward, the refrigerant enters the second chamber 12 through the notch on the first guide section 310 for further heat exchange. This structure improves the uniformity of refrigerant distribution at the bottom of the inner tub 100 and increases the contact time between the refrigerant and the bottom of the inner tub 100, thereby improving overall heat exchange efficiency.

[0034] like Figure 4 In another embodiment of this application, a plurality of second guide portions 320 are provided, and the plurality of second guide portions 320 are arranged at intervals in the radial direction of the inner barrel 100. Multiple second flow guides 320 extend around the center of the bottom of the inner tub 100 and are arranged in concentric circles. These multiple second flow guides 320 divide the first chamber 11 into multiple annular chambers arranged radially in the inner tub 100. Each second flow guide 320 has a through first notch 321 to connect the chambers on both sides of the second flow guide 320. The refrigerant inlet 20 is located in the middle of the bottom of the tub. When the refrigerant enters the heat exchange chamber 10 from the refrigerant inlet 20, it is first blocked by the innermost second flow guide 320 and spreads in the innermost chamber. Some of the refrigerant flows radially outward through the first notch 321 and continues to spread into the adjacent outer chamber. This extends the flow path of the refrigerant at the bottom of the inner tub 100, which helps to further improve the cooling effect at the bottom of the inner tub 100.

[0035] like Figure 4In another embodiment of this application, the first notch 321 on the adjacent second guide section 320 is offset in the circumferential direction of the inner barrel 100. The notch offset angle can be any angle such as 30 degrees, 60 degrees, or 180 degrees. In the structure of this solution, the angle is preferably 180 degrees. Specifically, after the refrigerant enters the first chamber 11 from the refrigerant inlet 20, it is guided to flow by multiple radially spaced second guide sections 320. When the refrigerant passes through the first gap 321 of one of the second guide sections 320, because the gaps of adjacent second guide sections 320 are misaligned in the circumferential direction, the refrigerant cannot pass through the next layer gap in a straight line and needs to detour to the misaligned gap position. During this process, the refrigerant flows in the circumferential direction of the inner barrel 100, forming a circular flow trajectory. Afterwards, the refrigerant flows out from the first gap 321 of the next second guide section 320 and continues to flow in a circular direction. In this way, the refrigerant repeatedly changes its flow direction between adjacent second guide sections 320, and the flow path is extended, which improves the uniformity of the refrigerant coverage on the outer wall of the inner barrel 100 and improves the overall heat exchange efficiency.

[0036] like Figure 3 In another embodiment of this application, the flow guiding structure 300 further includes a third flow guiding part 330, which protrudes into the second chamber 12 and extends around the side of the inner barrel 100. The third flow guiding part 330 is provided with a second notch 331 that passes through the axial direction of the inner barrel 100. The third flow guide 330 is configured as a protruding structure extending around the side of the inner tub 100. The protruding structure connects the outer wall of the inner tub 100 and the inner wall of the outer tub 200, and divides the second chamber 12 into independent chambers in the axial direction of the inner tub 100. In addition, the third flow guide 330 is provided with a second notch 331 that extends along the axial direction of the inner tub 100. The second notch 331 connects the aforementioned independent chambers. After the refrigerant enters the second chamber 12, it is restricted by the third flow guide 330 and spreads circumferentially along the inner tub 100. Then, the refrigerant enters the next chamber through the second notch 331 and continues to spread circumferentially along the inner tub 100, and finally exits from the refrigerant outlet 30. Through the above structure, the flow state of the refrigerant on the side of the inner tub 100 can be further improved, the contact time between the refrigerant and the side of the inner tub 100 can be extended, and the heat exchange efficiency can be further improved.

[0037] like Figure 3In another embodiment of this application, multiple third flow guides 330 are provided, and these multiple third flow guides 330 are spaced apart axially on the inner tub 100. Specifically, after the refrigerant enters the second chamber 12, it first spreads around the side of the inner tub 100 under the guidance of the lowest third flow guide 330. Then, the refrigerant flows upward through the second notch 331 and continues to spread around the side of the inner tub 100 under the guidance of the upper third flow guide 330. In this way, the side of the inner tub 100 is divided into multiple regions axially. These multiple regions exchange heat with the refrigerant sequentially from bottom to top, which also helps to fully exchange heat between the refrigerant and the inner tub 100 and improves the cooling effect. In addition, in another embodiment, the second notches 331 on adjacent third flow guides 330 are offset circumferentially on the inner tub 100. The angle of circumferential misalignment of the adjacent second notches 331 in the inner tub 100 is preferably 180 degrees. This ensures that after the refrigerant flows out from the second notch 331 of the lower third guide section 330, it needs to be forced to flow around the inner tub 100 once under the guidance of the upper third guide section 330 before it can continue to spread upwards. This extends the flow path of the refrigerant on the side of the inner tub 100 and ensures the uniformity of the temperature distribution on the side wall of the inner tub 100.

[0038] Furthermore, the flow guiding structure 300 is not limited to the structural forms described above, such as... Figure 5 As shown, the inner wall surface of the outer barrel 200 can be machined to form a groove structure. After the outer barrel 200 is fitted onto the inner barrel 100, the groove structure can cooperate with the outer wall of the inner barrel 100 to form a closed flow channel. The flow channel can extend from the bottom of the inner barrel 100 to the side of the inner barrel 100. The refrigerant inlet 20 and the refrigerant outlet 30 are both connected to the above-mentioned flow channel. The refrigerant flows along the above-mentioned flow channel, which can also achieve sufficient heat exchange with the inner barrel 100.

[0039] This utility model also proposes an ice cream machine, which includes a shell and an evaporator disposed on the shell. The shell also contains a compressor, an evaporator and a pipeline for refrigerant circulation, and the pipeline is connected to the heat exchange chamber 10 of the evaporator. The specific structure of the evaporator is as described in the above embodiments. Since this ice cream machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0040] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An evaporator for an ice cream machine, characterized in that, The evaporator includes: The inner drum is used to hold the medium to be frozen. An outer tub is fitted over the inner tub, with both ends of the outer tub being sealed to both ends of the inner tub to form a heat exchange chamber. The outer tub is also provided with a refrigerant inlet and a refrigerant outlet, both of which are connected to the heat exchange chamber. A flow guiding structure is provided inside the heat exchange cavity, and the flow guiding structure is used to guide the refrigerant to flow along the outer wall of the inner barrel.

2. The evaporator as described in claim 1, characterized in that, The refrigerant inlet is located in the middle of the bottom of the outer barrel, and the refrigerant outlet is located at the end of the outer barrel away from the bottom.

3. The evaporator as described in claim 2, characterized in that, The flow guiding structure includes a first flow guiding part protruding into the heat exchange cavity. The first flow guiding part divides the heat exchange cavity into a first chamber and a second chamber that are connected. The first chamber is opposite to the bottom of the inner barrel, and the second chamber is opposite to the side of the inner barrel.

4. The evaporator as described in claim 3, characterized in that, The flow guiding structure further includes a second flow guiding part, which protrudes from the first cavity and extends around the center of the bottom of the inner barrel. The second flow guiding part is provided with a first notch that extends radially through the inner barrel.

5. The evaporator as described in claim 4, characterized in that, Multiple second flow guides are provided, and the multiple second flow guides are arranged at intervals in the radial direction of the inner barrel.

6. The evaporator as described in claim 5, characterized in that, The first notch on the adjacent second guide section is offset in the circumferential direction of the inner barrel.

7. The evaporator according to any one of claims 3 to 6, characterized in that, The flow guiding structure further includes a third flow guiding part, which protrudes from the second cavity and extends around the side of the inner barrel. The third flow guiding part is provided with a second notch that extends through the axial direction of the inner barrel.

8. The evaporator as claimed in claim 7, characterized in that, Multiple third flow guides are provided, and the multiple third flow guides are spaced apart along the axial direction of the inner barrel.

9. The evaporator as claimed in claim 8, characterized in that, The second notch on the adjacent third guide section is offset in the circumferential direction of the inner barrel.

10. An ice cream machine, characterized in that, Includes the evaporator according to any one of claims 1 to 9.

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