Evaporator of ice maker and ice maker with evaporator

Abstract

The invention relates to the technical field of ice making equipment, in particular to an ice making machine evaporator and an ice making machine with the evaporator, the ice making machine evaporator comprises an evaporation pipe, an ice making column and a separation sheet arranged in the evaporation pipe and the ice making column, and the top of the ice making column is communicated with the interior of the evaporation pipe; one end of the separation sheet is located in the evaporation pipe, connected with the inner wall of the evaporation pipe and used for separating an inner cavity of the evaporation pipe, and the other end of the separation sheet protrudes into the ice-making column to separate an inner cavity of the ice-making column and forms a gap flow channel with the bottom of the ice-making column, wherein a refrigerant flows through the gap flow channel; by means of the structure, refrigerants can rapidly reach each ice making column when entering the evaporation pipe, the flowing time of the refrigerants is shortened, the refrigerants conduct heat exchange in the fastest time, the refrigerating effect of the ice making columns is improved, and the ice making effect of the ice making columns is improved. Therefore, each ice making column can be used for rapidly and effectively making ice blocks in unit time.

Description

Technical Field

[0001] The invention relates to the technical field of ice making equipment, in particular to an ice making machine evaporator and an ice making machine with the evaporator. Background Art

[0002] An ice maker is a refrigeration machine that generates ice by cooling water through an evaporator with the refrigerant of the refrigeration system. As an important component of an ice maker, the evaporator uses a high-temperature, high-pressure liquid refrigerant to evaporate in the evaporator tube through a throttling device, and the vaporization absorbs heat to achieve a cooling effect. The evaporator tube transfers the cold energy to the ice template in the ice maker, causing the water flowing into the ice template to freeze and form ice cubes, which can be used.

[0003] Application No. CN03278051.6 discloses an ice-making evaporator, which discloses that a partition is arranged inside the ice-making tube to divide the ice-making tube into two chambers, and there is a gap between the other end of the partition and the inner chamber end wall of the evaporating tube, and the gap is used for the refrigerant to pass through. The length of the partition in each ice-making tube on the evaporating tube is the same, and such a structural design is unreasonable. The resistance of the refrigerant flowing in the evaporating tube is large, resulting in a slow circulation of the coolant and an unsmooth flow, thereby causing the ice-making time of the ice-making machine to be long, the ice output is small, and the ice-making effect is poor. In addition, the ice-making time of the ice-making machine with such a structure is too long, a large amount of electricity is consumed, and excessive costs are increased. Summary of the invention

[0004] In order to solve the above technical problems, an object of the present invention is to provide an ice-making machine evaporator which improves the flow rate of refrigerant and has a high and stable ice-making effect, and an ice-making machine having the evaporator.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: An ice-making machine evaporator comprises an evaporating tube, a plurality of ice-making columns arranged on the evaporating tube, and a plurality of partitions arranged inside the evaporating tube and the ice-making columns, wherein the ice-making columns are arranged crosswise with the evaporating tube, and the tops of the ice-making columns are communicated with the interior of the evaporating tube; one end of the partition is located inside the evaporating tube and is connected to the inner wall of the evaporating tube and divides the inner cavity of the evaporating tube, and the other end of the partition protrudes into the ice-making columns to divide the inner cavity of the ice-making columns and forms a gap flow channel for refrigerant circulation with the bottom of the ice-making columns; the lengths of the plurality of partitions increase successively along the direction from the inlet end to the outlet end of the evaporating tube.

[0006] Furthermore, a return air pipe is provided at the outlet end of the evaporating tube, and the cross-sectional area of ​​the gap flow channel in the ice-making column on the evaporating tube closest to the outlet end of the evaporating tube is close to the cross-sectional area of ​​the return air pipe.

[0007] Furthermore, the cross-sectional area of ​​the gap flow channel is T, and the cross-sectional area T of the gap flow channel includes the shaping area M of the bottom of the partition, the shaping cross-sectional area Y of the bottom of the ice column and the cross-sectional area K of the middle flow portion, and T=M+Y+K; the cross-sectional area of ​​the return air pipe is S, and the cross-sectional area S of the return air pipe is equal to the cross-sectional area T of the gap flow channel; the length of the partition close to the return air pipe is L and the length of the ice column corresponding to it is H, the cross-sectional width of the ice column is D, the cross-sectional area K of the middle flow portion is K=(HL)xD, and the relationship between the length L of the partition and the cross-sectional area S of the return air pipe is: .

[0008] Furthermore, a plurality of ice-making columns are sequentially arranged along the direction from the inlet end to the outlet end of the evaporating tube, and the difference between two partitions in two adjacent ice-making columns is the same.

[0009] Furthermore, the bottom of the separator is concave inwardly at one end facing the top of the evaporating tube and is arranged in an arc shape.

[0010] Furthermore, the evaporation tube is in a U-shape, the center line of the ice-making column is arranged perpendicular to the axis of the evaporation tube, and the partition is located at the center of the ice-making column.

[0011] Furthermore, the evaporation tube is in a ring shape, the inlet end and the outlet end of the evaporation tube are respectively located on both sides of the evaporation tube or the inlet end and the outlet end of the evaporation tube are both located on the same side of the evaporation tube; the center line of the ice-making column is arranged perpendicular to the axis of the evaporation tube, and the partition is located at the center of the ice-making column.

[0012] The present invention also provides an ice-making machine, comprising the above-mentioned ice-making machine evaporator.

[0013] Beneficial effects of the present invention: The evaporator is designed by increasing the separators in the ice-making columns on the evaporating tube, that is, the lengths of the separators increase in sequence along the direction from the inlet end to the outlet end of the evaporating tube, and the separators in the next ice-making column are longer than the lengths of the separators in the previous ice-making column. The design of the structure can make the gap flow space of the ice-making columns at the front end of the evaporating tube larger than the gap flow space of the ice-making columns at the back, reduce the resistance of the gap flow channel, so that the refrigerant can quickly reach each ice-making column after entering the evaporating tube, shorten the flow time of the refrigerant, and make the refrigerant exchange heat in the fastest time, improve the heat exchange coefficient of the refrigerant, and thus improve the refrigeration effect of the ice-making column, so that each ice-making column can quickly make ice cubes in a unit time, thereby improving the ice-making efficiency of the entire evaporator, and preventing the refrigerant from losing too much invalid refrigeration energy during the flow process. The design of the mechanism can effectively solve the problems of long refrigerant transfer time between each ice-making column and large refrigeration capacity loss in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the evaporator of the present invention.

[0015] Figure 2 middle Figure 2-1 It is a schematic diagram of one structure of the ice column making method of the present invention; Figure 2-2 Another structural schematic diagram of the ice column making method of the present invention is shown in FIG.

[0016] Figure 3 It is a schematic diagram of the cross-sectional area of ​​the gap flow channel of the present invention.

[0017] Figure 4 It is a schematic diagram of the structure of the U-shaped evaporator of the present invention.

[0018] Figure 5 middle Figure 5-1 It is a schematic diagram of the annular structure of the evaporator of the present invention; Figure 5-2 for Figure 5-1 Schematic diagram of the cross-sectional structure along the AA direction.

[0019] Description of reference numerals: 1. Evaporation tube; 2. Ice column; 3. Separator; 4. Gap flow channel; 11. Inlet end; 12. Outlet end; 111. First flow cavity; 112. Second flow cavity; 113. First chamber; 114. Second chamber; 21. First ice column; 22. Second ice column; 23. Third ice column; 24. Nth ice column; 31. First separator; 32. Second separator; 33. Third separator; 34. Nth separator. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0021] like Figures 1 to 5 As shown, the present invention provides an ice-making machine evaporator, which includes an evaporating tube 1, a plurality of ice-making columns 2 arranged on the evaporating tube 1, and a plurality of dividing sheets 3 arranged inside the evaporating tube 1 and the ice-making columns 2, wherein the ice-making columns 2 and the evaporating tube 1 are cross-arranged, and the top of the ice-making columns 2 is connected to the inside of the evaporating tube 1; one end of the dividing sheet 3 is located inside the evaporating tube 1 and is connected to the inner wall of the evaporating tube 1 and separates the inner cavity of the evaporating tube 1, and the other end of the dividing sheet 3 protrudes into the ice-making columns 2 to separate the inner cavity of the ice-making columns 2 and forms a gap flow channel 4 for refrigerant circulation with the bottom of the ice-making columns 2; the lengths of the plurality of dividing sheets 3 increase sequentially along the direction from the inlet end 11 to the outlet end 12 of the evaporating tube 1.

[0022] In this embodiment, a plurality of ice-making columns 2 are sequentially arranged in an array along the evaporating tube 1. The general usage scenario is that the ice-making columns 2 are arranged vertically to the evaporating tube 1. Of course, the ice-making columns 2 can also be arranged at an inclined angle to the evaporating tube 1. In the prior art, the partition sheet 3 is arranged inside the evaporating tube 1 and the ice-making columns 2 to divide the inner cavity of the evaporating tube 1 into a first flow cavity 111 and a second flow cavity 112, and to divide the inner cavity of the ice-making columns 2 into a first chamber 113 and a second chamber 114. The gap flow channel 4 formed by the bottom of the partition plate 3 and the bottom of the ice-making column 2 is used to connect the first chamber 113 and the second chamber 114, and is used as a space for the refrigerant to perform heat exchange in the ice-making column 2; in actual application, the refrigerant enters from the inlet end 11 of the evaporator tube 1, flows along the first flow cavity 111 to the first chamber 113 of the ice-making column 2, then flows through the gap flow channel 4 to the second chamber 114, and finally flows through the second flow cavity 112 to another ice-making column 2, and so on, and flows out from the outlet end 12 of the evaporator tube 1 after passing through the last ice-making column 2. In the prior art, the length of the partition 3 in each ice column 2 is fixed, so that the space of each gap flow channel 4 in the ice column 2 for the refrigerant to flow is the same. Although the design of this structure allows the refrigerant to flow from the inlet end 11 of the evaporator tube 1 to the outlet end 12 of the evaporator tube 1, this structure has the following defects in actual use: the transfer time of the refrigerant from the first ice column 2 to the last ice column 2 is relatively long, because the refrigerant in each ice column 2 must overcome the same resistance to reach the last ice column 2, then the refrigerant enters the evaporator tube 1 under the action of a fixed pressure, and when the refrigerant flows to the subsequent ice column 2, its flow power will be correspondingly reduced, so that the refrigerant needs a long transfer time to pass through multiple ice columns 2; and a long transfer time will lead to a large loss of cooling capacity, resulting in a small amount of ice made per unit time, and a poor user experience. At the same time, due to the long ice making time, the power consumption of the ice maker will also increase relatively, which increases the cost of ice making.

[0023] In view of the above-mentioned defects, the structure of the present technical solution is designed: the lengths of the plurality of separators 3 increase in sequence along the direction from the inlet end 11 to the outlet end 12 of the evaporation tube 1. Figure 1As shown, the length of the separator 3 in each ice column 2 on the evaporating tube 1 is different. With reference to the flow direction of the refrigerant, the length of the separator 3 in the next ice column 2 is longer than the length of the separator 3 in the previous ice column 2. That is, the lengths of the separators 3 in the ice columns 2 arranged in sequence along the flow direction of the refrigerant are increased in sequence, but the length of the separator 3 in the last ice column 2 (i.e., the ice column 2 closest to the outlet end 12) is not connected to the bottom of the inner wall of the ice column 2, and the gap flow channel 4 is always retained. In other words, the gap of the gap flow channel 4 through which the refrigerant flows from entering the evaporating tube 1 to flowing out of the evaporating tube 1 is getting smaller and smaller.

[0024] The design of this structure has the following functions: First, the heat exchange efficiency of the refrigerant is mainly reflected in the size of the heat exchange coefficient. The larger the heat exchange coefficient of the refrigerant, the better the refrigeration effect. The heat exchange coefficient of the refrigerant is affected by the flow rate and the pipe material. If the pipe material remains unchanged, increasing the flow rate of the refrigerant can increase the heat exchange coefficient of the refrigerant, thereby making the refrigeration effect better. The structural design of this technical solution is to increase the flow rate of the refrigerant in the evaporating tube 1 and the ice column 2.

[0025] In actual application, when the refrigerant enters the evaporating tube 1 from the inlet end 11, due to the large space of the gap flow channel 4 in the front ice-making column 2, the refrigerant can flow quickly into the last ice-making column 2 under a certain pressure, so that the refrigerant entering the evaporating tube 1 can be quickly filled or replace the old refrigerant in the shortest time. The purpose is to allow the refrigerant to quickly reach each ice-making column 2 and allow the refrigerant to perform heat exchange in the fastest time, thereby improving the heat transfer coefficient of the refrigerant, so that each ice-making column 2 can quickly make ice cubes per unit time, thereby improving the ice-making efficiency of the entire evaporator, and preventing the refrigerant from losing too much invalid refrigeration energy during the flow process. The length of the partition plate 3 of each ice-making column 2 of the technical solution is a structural design that increases gradually, which can effectively solve the problem of long refrigerant transfer time between each ice-making column 2 and large refrigeration capacity loss in the prior art.

[0026] Second, during the operation of the evaporator, the pressure difference in the evaporation tube 1 will also have a great impact on the ice-making efficiency and performance. The heat transfer coefficient of the refrigerant will also be affected by temperature and pressure. At the same temperature, a large pressure difference in the evaporation tube 1 will lead to a decrease in the heat transfer coefficient, which will directly lead to a poor refrigeration effect, causing the ice-making evaporator to have slow ice-making efficiency and ice that is not formed.

[0027] In the prior art, since the refrigerant in the ice-making column 2 is heat exchanged so that the ice-making column 2 can turn the liquid it contacts into a solid state, that is, turn water into ice. The refrigerant undergoes a liquid-gas phase change during the heat exchange process, and the refrigerant is completely vaporized when it flows to the last ice-making column 2, causing a certain pressure difference in the evaporation tube 1. This pressure difference directly affects the ice-making efficiency and effect of the evaporator.

[0028] Therefore, in the present technical solution, each ice-making column 2 has a length of a corresponding partition sheet 3 that gradually increases along the refrigerant flow direction, so that the space of the gap flow channel 4 of each ice-making column 2 through which the refrigerant passes in sequence is also from large to small. Then, the design of this structure can make the flow resistance of the refrigerant increase from small to large, so that the refrigerant can flow quickly into the ice-making column 2 behind. The tightening of the space of the gap flow channel 4 of the ice-making column 2 behind is to slow down the refrigerant, so that the pressure at the outlet end 12 of the evaporator tube 1 is slightly higher than the pressure at the inlet end 11 of the evaporator tube 1, which can make the pressure difference in the evaporator tube 1 smaller, thereby improving the heat exchange coefficient of the refrigerant, thereby solving the problems of slow ice-making efficiency and unformed ice. At the same time, the refrigerant is slowed down at the rear end of the evaporator tube 1 to prevent the refrigerant from flowing out of the evaporator tube 1 too quickly, so that the refrigerant can be kept in the evaporator tube 1 for an effective heat exchange time, thereby improving the ice-making effect.

[0029] In summary, the structural design of the technical solution can accelerate the expansion speed of the refrigerant in the evaporator (increase the Reynolds coefficient value), shorten the circulation time of the refrigerant in the evaporator, thereby increasing the effective cooling capacity, while also reducing the ineffective cooling capacity and reducing the loss. While improving the ice-making efficiency and ice-making effect, the ice-making machine can also reduce energy consumption, save energy and protect the environment.

[0030] In the technical solution, the outlet end 12 of the evaporator tube 1 is provided with a return air pipe, and the cross-sectional area of ​​the gap flow channel 4 in the ice-making column 2 on the evaporator tube 1 closest to the outlet end 12 of the evaporator tube 1 is close to the cross-sectional area of ​​the return air pipe. The design of this structure can make the refrigerant flow rate of the last ice-making column 2 infinitely close to or equal to the flow rate of the return air pipe, so that the pressure of the refrigerant when it flows to the last ice-making column 2 is equal to or infinitely close to the pressure when it enters the return air pipe, in order to make the pressure difference of the refrigerant from entering the evaporator tube 1 to exiting the evaporator tube 1 smaller or close to the optimal pressure difference, thereby improving the heat exchange coefficient of the refrigerant, improving the ice-making efficiency and ice-making quality of the ice-making column 2, thereby solving the problems of slow ice-making efficiency and unformed ice.

[0031] Specifically, Figure 3 As shown, note: Figure 3The oblique lines in the figure are used to indicate the cross-sectional area of ​​the shaded portion. The cross-sectional area of ​​the gap flow channel 4 is T, and the cross-sectional area T of the gap flow channel 4 includes the shaping area M of the bottom of the partition plate 3, the shaping cross-sectional area Y of the bottom of the ice column 2, and the cross-sectional area K of the middle flow portion. Due to different types of ice making requirements, the shaping design of the bottom of the partition plate 3 can be an inward concave arc (such as Figure 3 As shown), it can also be a concave triangle or quadrilateral, thus, the area of ​​this part is collectively referred to as M. If the bottom of the separator 3 is flat (such as Figure 2-2 As shown in FIG. 1 ), this part has no shape, and its shape area M is zero. When the bottom of the ice column 2 is flat, the shape cross-sectional area of ​​the bottom of the ice column 2 is zero. In summary, the cross-sectional area of ​​the gap flow channel 4 is T=M+Y+K.

[0032] The cross-sectional area of ​​the return air pipe is S, and the cross-sectional area S of the return air pipe is equal to the cross-sectional area T of the gap flow channel 4. The length of the partition 3 close to the return air pipe (that is, the partition 3 in the last ice-making column 2) is L and the length of the corresponding ice-making column 2 is H; Figure 1 and Figure 3 As shown, the length L of the partition 3 here refers to the straight-line distance from its top to its bottom. The length H of the ice column 2 is Figure 1 and Figure 3 Length of straight line shown.

[0033] like Figure 3 As shown, the cross-sectional width of the ice column 2 is D. If the ice column 2 is cylindrical, its cross-sectional width is the diameter of the cylinder. The cross-sectional area of ​​the intermediate flow portion is K = (HL) x D. The length L of the partition plate 3 and the cross-sectional area S of the return air pipe are related to each other as follows: The length of the last separator 3 can be calculated from the above formula, and the length of each separator before it is reduced one by one according to the specified value.

[0034] like Figure 1 As shown, the partitions 3 sequentially arranged in each ice-making column 2 along the direction from the inlet end 11 to the outlet end 12 of the evaporating tube 1 are the first partition 31, the second partition 32, the third partition 33, and the last one is the Nth partition 34; the length of the Nth partition 34 is greater than the length of the N-1th partition 3, and N is greater than or equal to 2.

[0035] In actual application, in the gap flow channel 4 of the first ice column 21, due to the short length of the partition plate 3, the circulation space here is large, so that the liquid-gas mixed refrigerant is less obstructed here, and the refrigerant flows smoothly and quickly to the second ice column 22; similarly, the refrigerant is less obstructed in the gap flow channel 4 of the second ice column 22, and the refrigerant also flows smoothly and quickly to the third ice column 23; and so on, when the refrigerant reaches the rear of the last ice column (i.e., the Nth ice column), the refrigerant has completed all the gasification-heat absorption. In the whole process, the resistance to the liquid-gas phase change of the refrigerant is small, the pressure between the inlet end 11 and the outlet end 12 of the evaporation tube 1 is also small, and the number of bubbles generated per unit time is large, which improves the heat exchange efficiency of the refrigerant, thereby reducing the loss of cooling capacity, high cooling efficiency, rapid cold and heat exchange, and high conduction efficiency.

[0036] Preferably, a plurality of ice columns 2 are sequentially arranged along the direction from the inlet end 11 to the outlet end 12 of the evaporating tube 1, and the difference between the two partitions 3 in two adjacent ice columns 2 is the same. In practical applications, each evaporator will determine the number of ice columns 2 on the evaporating tube 1 according to factors such as its size, power, and usage, and calculate the length L of the partition 3 in the ice column 2 where the refrigerant flows last. Assume that the length of the last partition 3 is L n , then the separators 3 pushed forward are L n , L n-1 , L n-2 , ...L 1 , then L n -L n-1 =L n-1 -L n-2 =L n-2 -L n-3 =……=L 2 -L 1 , the difference is determined according to the cooling capacity of the evaporator. However, the number of ice-making columns 2 is limited. Assuming that the number of ice-making columns 2 is N, then N (L 2 -L 1 ) is less than axL n Here, the value range of a is one quarter to one half, and the specific value is determined according to the cooling capacity of the evaporator. The different lengths of the partitions 3 can optimize the speed and pressure difference of the refrigerant entering the evaporation tube 1. As long as the speed of the refrigerant is fast enough and the pressure difference is small enough, the heat exchange coefficient of the refrigerant can be maximized, thereby increasing the effective cooling capacity of the refrigerant, improving the efficiency and quality of ice making, and reducing the energy consumption of the ice maker.

[0037] In the technical solution, the bottom of the separator 3 is concave inwardly toward the end of the top of the evaporation tube 1 and is arranged in an arc shape. In this embodiment, the cross-sectional shape formed by the bottom of the separator 3 and the bottom of the ice column 2 where it is located is a rounded rectangle (such as Figure 3 The cross-sectional shape of the last ice-making column 2 (i.e., the ice-making column 2 closest to the outlet end 12 of the evaporation tube 1) can be a rounded rectangle or a circle (as shown in FIG. Figure 2-1 As shown in the figure, preferably, the cross-sectional shape formed by the bottom of the last partition 3 and the bottom of the ice-making column 2 where it is located is circular. The cross-sectional shape formed by the bottom of the partition 3 and the bottom of the ice-making column 2 where it is located is equal to the cross-sectional area of ​​the return air pipe. The design of this structure can further reduce the flow resistance of the gap flow channel 4 to the refrigerant, and at the same time provide more sufficient refrigeration space for the refrigerant, so that the refrigerant has more contact area with the inner wall of the ice-making column, effectively improving the refrigeration efficiency and ice-making quality.

[0038] In the technical solution, one of the evaporation tubes 1 is in a U-shape, the center line of the ice-making column 2 is perpendicular to the axis of the evaporation tube 1 , and the partition plate 3 is located at the center of the ice-making column 2 .

[0039] In the present technical solution, another shape of the evaporation tube 1 is a ring shape, and the inlet end 11 and the outlet end 12 of the evaporation tube 1 are respectively located on both sides of the evaporation tube 1 or the inlet end 11 and the outlet end 12 of the evaporation tube 1 are both located on the same side of the evaporation tube 1; the center line of the ice-making column 2 is arranged perpendicular to the axis of the evaporation tube 1, and the partition plate 3 is located at the center of the ice-making column 2.

[0040] In summary, the evaporating tubes 1 can be connected in series or in parallel. The series type means that the lengths of the separators 3 arranged in sequence along the direction from the inlet end 11 to the outlet end 12 of the evaporating tube 1 increase one by one; the parallel type means that multiple evaporating tubes 1 are arranged in multiple rows, and the two ends of the multiple evaporating tubes 1 are connected to each other, but the inlet end 11 and the outlet end 12 are respectively located on both sides of the multiple evaporating tubes 1, and the structure on each evaporating tube 1 is the same, and the lengths of the multiple separators 3 on the evaporating tube 1 increase one by one along the direction from the inlet end 11 to the outlet end 12.

[0041] The present invention also includes an ice-making machine, which includes the above-mentioned ice-making machine evaporator. The ice-making machine has all the above-mentioned beneficial effects, which will not be repeated here.

[0042] All technical features in this embodiment can be freely combined according to actual needs.

[0043] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. An ice machine evaporator, characterized in that: The invention comprises an evaporating tube (1), a plurality of ice-making columns (2) arranged on the evaporating tube (1), and a plurality of separators (3) arranged on the evaporating tube (1) and the ice-making columns (2); the ice-making columns (2) and the evaporating tube (1) are arranged in a cross-arrangement, and the top of the ice-making columns (2) is communicated with the inside of the evaporating tube (1); one end of the separator (3) is located inside the evaporating tube (1) and is connected to the inner wall of the evaporating tube (1) and separates the inner cavity of the evaporating tube (1); the other end of the separator (3) protrudes into the ice-making columns (2) and separates the inner cavity of the ice-making columns (2) and forms a gap flow channel (4) for the circulation of refrigerant with the bottom of the ice-making columns (2); the lengths of the plurality of separators (3) increase in sequence along the direction from the inlet end (11) to the outlet end (12) of the evaporating tube (1).

2. The ice machine evaporator according to claim 1, characterized in that: The outlet end (12) of the evaporating tube (1) is provided with an air return pipe, and the cross-sectional area of ​​the gap flow channel (4) in the ice-making column (2) on the evaporating tube (1) closest to the outlet end (12) of the evaporating tube (1) is close to the cross-sectional area of ​​the air return pipe.

3. An ice machine evaporator according to claim 2, characterized in that: The cross-sectional area of ​​the gap flow channel (4) is T, and the cross-sectional area T of the gap flow channel (4) includes the shaping area M of the bottom of the partition plate (3), the shaping cross-sectional area Y of the bottom of the ice column (2) and the cross-sectional area K of the middle flow portion, wherein T=M+Y+K; the cross-sectional area of ​​the return air pipe is S, and the cross-sectional area S of the return air pipe is equal to the cross-sectional area T of the gap flow channel (4); the length of the partition plate (3) close to the return air pipe is L and the length of the corresponding ice column (2) is H, the cross-sectional width of the ice column (2) is D, the cross-sectional area K of the middle flow portion is K=(HL)xD, and the relationship between the length L of the partition plate (3) and the cross-sectional area S of the return air pipe is: .

4. The ice machine evaporator according to claim 3, characterized in that: A plurality of ice-making columns (2) are arranged in sequence along the direction from the inlet end (11) to the outlet end (12) of the evaporating tube (1), and the difference between two partitions (3) in two adjacent ice-making columns (2) is the same.

5. The ice making machine evaporator according to claim 1, characterized in that: The bottom of the separation sheet (3) is concave inwardly and arranged in an arc shape at one end facing the top of the evaporation tube (1).

6. The ice making machine evaporator according to claim 1, characterized in that: The evaporation tube (1) is in a U-shape, the center line of the ice-making column (2) is arranged perpendicular to the axis of the evaporation tube (1), and the partition plate (3) is located at the center of the ice-making column (2).

7. The ice machine evaporator according to claim 1, characterized in that: The evaporation tube (1) is in the shape of a ring, and the inlet end (11) and the outlet end (12) of the evaporation tube (1) are respectively located on both sides of the evaporation tube (1) or the inlet end (11) and the outlet end (12) of the evaporation tube (1) are both located on the same side of the evaporation tube (1); the center line of the ice-making column (2) is arranged perpendicular to the axis of the evaporation tube (1), and the partition plate (3) is located at the center of the ice-making column (2).

8. An ice making machine, characterized in that: The ice making machine evaporator comprises the ice making machine evaporator according to any one of claims 1 to 7.

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