An evaporator and ice-making equipment

Abstract

The embodiment of the application relates to the technical field of ice making, and discloses an evaporator and ice making equipment, the evaporator comprising a refrigeration stator, a roller, a feed pipe and an exhaust pipe, the refrigeration stator being provided with an evaporation cavity and a first peripheral wall, the first peripheral wall constituting part of the boundary of the evaporation cavity; the roller is sleeved on the refrigeration stator, the roller being configured to be rotatable relative to the refrigeration stator, the roller having a second peripheral wall, the first peripheral wall being located in the second peripheral wall, and the first peripheral wall and the second peripheral wall being filled with a heat-conducting medium; the feed pipe is configured to allow refrigerant medium to flow into the evaporation cavity; and the exhaust pipe is in communication with the evaporation cavity. In the above manner, the embodiment of the application can reduce the risk of refrigerant medium leakage.

Description

Technical Field

[0001] This application relates to the field of ice-making technology, and in particular to an evaporator and ice-making equipment. Background Technology

[0002] An evaporator is used to evaporate a cooling medium. As the cooling medium evaporates inside the evaporator, it absorbs heat, which in turn releases heat on the surface of the evaporator to produce ice or shaved ice.

[0003] When making shaved ice, a drum-type evaporator is typically used. In related technologies, a refrigerant is usually introduced into the drum, which is then driven to rotate continuously around a shaft, keeping its outer surface in contact with the liquid. This allows ice to form on the drum's surface. A blade is placed on the outside of the drum; as the drum rotates, the blade scrapes off the ice from the drum's surface, forming shaved ice. To reduce the risk of refrigerant leakage from the drum, a dynamic seal is usually installed between the drum and the shaft.

[0004] During the implementation of this application embodiment, the inventors discovered that: because the drum needs to rotate continuously, the sealing ability of the dynamic sealing ring is easily reduced, and the cold medium inside the drum is prone to leakage. Summary of the Invention

[0005] The main technical problem addressed by the embodiments of this application is to provide an evaporator and ice-making equipment that can reduce the risk of refrigerant leakage.

[0006] To solve the above-mentioned technical problems, one technical solution adopted in this application embodiment is: to provide an evaporator, including a refrigeration stator, a drum, a feed pipe and an exhaust pipe, wherein the refrigeration stator is provided with an evaporation chamber and a first peripheral wall, the first peripheral wall forming part of the boundary of the evaporation chamber; the drum is sleeved on the refrigeration stator and is configured to rotate relative to the refrigeration stator, the drum having a second peripheral wall, the first peripheral wall being located inside the second peripheral wall, and a heat-conducting medium being filled between the first peripheral wall and the second peripheral wall; the feed pipe is configured to supply a cooling medium to flow into the evaporation chamber; and the exhaust pipe is connected to the evaporation chamber.

[0007] In some embodiments, the roller also has a top wall and a bottom wall, the top wall being connected to one end of the second peripheral wall and the bottom wall being connected to the other end of the second peripheral wall, the top wall, the bottom wall and the second peripheral wall together enclosing a receiving space, in which at least a portion of the cooling stator is received.

[0008] In some embodiments, the evaporator further includes a first heat insulation member disposed on the side of the top wall near the bottom wall and located between the top wall and the refrigeration stator; and / or, the evaporator further includes a second heat insulation member disposed on the side of the bottom wall near the top wall and located between the bottom wall and the refrigeration stator.

[0009] In some embodiments, the cooling stator is provided with a rotating shaft, and the roller is provided with a sleeve portion, which is sleeved on the rotating shaft and can rotate around the rotating shaft.

[0010] In some embodiments, a positioning protrusion is provided at the end of the cooling stator away from the rotation axis, and a positioning groove is provided on the roller, with the positioning protrusion at least partially received in the positioning groove.

[0011] In some embodiments, the evaporator further includes a bearing, the inner ring of which is sleeved on the rotating shaft, and the outer ring of which is connected to the sleeve portion.

[0012] In some embodiments, the evaporator further includes a sealing ring, which is sleeved on the rotating shaft and abuts against the sleeve portion.

[0013] In some embodiments, a drive shaft is provided at the end of the roller away from the sleeve portion, and the drive shaft is coaxial with the rotation shaft.

[0014] In some embodiments, a feed pipe passes through a rotating shaft and is at least partially housed in an evaporation chamber, with an outlet provided in the portion of the feed pipe housed in the evaporation chamber; and an exhaust pipe is at least partially inserted into the rotating shaft.

[0015] To solve the above-mentioned technical problems, another technical solution adopted in this application embodiment is: to provide an ice-making device, including a compressor, a condenser, a throttle valve and the above-mentioned evaporator, wherein the outlet of the compressor is connected to the inlet of the condenser, the inlet of the throttle valve is connected to the outlet of the condenser, the feed pipe of the evaporator is connected to the outlet of the throttle valve, and the exhaust pipe of the evaporator is connected to the inlet of the compressor.

[0016] The beneficial effects of this application embodiment are as follows: Unlike the prior art, in this application embodiment, by sleeved a roller on the refrigeration stator and allowing the roller to rotate relative to the refrigeration stator, and injecting refrigerant into the evaporation chamber through the feed pipe, neither the feed pipe nor the exhaust pipe needs to rotate relative to the refrigeration stator. This helps reduce the risk of wear between the feed pipe and the refrigeration stator, and between the exhaust pipe and the refrigeration stator, and improves the sealing performance between the feed pipe and the refrigeration stator, thereby reducing the risk of refrigerant leakage. In addition, by filling the space between the first and second peripheral walls with a heat-conducting medium, on the one hand, the heat-conducting medium can have a lubricating effect, which helps reduce the friction between the roller and the refrigeration stator; on the other hand, the heat-conducting medium can improve the heat transfer efficiency between the first and second peripheral walls, thereby improving the ice-making efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the structure of an evaporator in the prior art;

[0019] Figure 2 This is a schematic diagram of the evaporator provided in the embodiments of this application from a first-view perspective;

[0020] Figure 3 This is an exploded view of the evaporator provided in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the evaporator provided in the embodiments of this application from a second perspective;

[0022] Figure 5 It is along Figure 4 Schematic diagram of the structure after AA is cut open;

[0023] Figure 6 This is a schematic diagram showing the connection relationship between the evaporator, compressor, condenser and expansion valve provided in the embodiments of this application;

[0024] Figure 7 This is a schematic diagram of the evaporator and blade provided in the embodiments of this application.

[0025] Attached icon number

[0026] 100. Evaporator;

[0027] 1. Refrigeration stator; 11. Evaporator chamber; 12. First peripheral wall; 13. Rotating shaft; 14. Positioning protrusion; 2. Roller; 21. Second peripheral wall; 22. Top wall; 23. Bottom wall; 24. Accommodation space; 25. Sleeve section; 26. Positioning groove; 28. Drive shaft;

[0028] 3. Feed pipe; 31. Discharge port;

[0029] 4. Exhaust pipe; 5. First heat insulation component; 6. Second heat insulation component; 7. Bearing; 8. Sealing ring; 9. Thermally conductive gap;

[0030] 200, Compressor; 300, Condenser; 400, Expansion valve; 500, Blade. Detailed Implementation

[0031] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0033] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0034] Figure 1 This is a schematic diagram of the structure of a drum evaporator 100' in the related art. Please refer to the related art for further details. Figure 1 The evaporator 100' includes a drum 1', a feed pipe 2', and a discharge pipe 3'. The drum 1' and feed pipe 2' are rotatably connected, as are the drum 1' and discharge pipe 3'. The feed pipe 2' is used to introduce the refrigerant, which is sprayed onto the inner wall of the drum 1', causing it to evaporate and form a gaseous state. The gaseous refrigerant is discharged to the outside through the discharge pipe 3'. During evaporation, the refrigerant absorbs heat from the drum. When the outer surface of the drum 1' comes into contact with the liquid, the liquid on the outer surface of the drum 1' condenses into ice. To reduce the risk of refrigerant leakage, dynamic sealing rings 4' are installed between the drum 1' and feed pipe 2', and between the drum 1' and discharge pipe 3'.

[0035] However, in related technologies, because the roller 1' needs to rotate continuously, the dynamic seal ring 4' is prone to wear, which leads to a deterioration in the sealing performance between the roller 1' and the feed pipe 2' or between the roller 1' and the discharge pipe 3', thereby increasing the risk of leakage of the cold medium.

[0036] To at least partially solve the above problems, this application provides an evaporator and ice-making equipment that can reduce the risk of refrigerant leakage.

[0037] The specific structure and function of this application will be described in detail below.

[0038] Please see Figure 2 and Figure 3 The evaporator 100 includes a refrigeration stator 1, a drum 2, a feed pipe 3, and an exhaust pipe 4. The drum 2 is sleeved on the refrigeration stator 1, and at least a portion of the refrigeration stator 1 is housed inside the drum 2. The drum 2 is configured to rotate relative to the refrigeration stator 1. The feed pipe 3 is used to introduce a refrigerant, which evaporates into a gas within the refrigeration stator 1, thereby absorbing heat from the interior of the refrigeration stator 1. The heat from the drum 2 is transferred to the refrigerant through the refrigeration stator 1, causing the liquid on the surface of the drum 2 to condense into ice. The exhaust pipe 4 is disposed on the refrigeration stator 1, allowing the gas to be discharged when the refrigerant evaporates into a gas within the refrigeration stator 1.

[0039] For the aforementioned cooling stator 1, please refer to... Figure 5 The refrigeration stator 1 is provided with an evaporation chamber 11 and a first peripheral wall 12, the first peripheral wall 12 forming part of the boundary of the evaporation chamber 11. The feed pipe 3 is connected to the evaporation chamber 11 so that the refrigerant can flow into the evaporation chamber 11 through the feed pipe 3. When the refrigerant comes into contact with the first peripheral wall 12, the refrigerant evaporates into a gas and absorbs heat from the refrigeration stator 1. The exhaust pipe 4 is connected to the evaporation chamber 11 so that the evaporated refrigerant can be discharged from the exhaust pipe 4.

[0040] In some embodiments, the feed pipe 3 is at least partially housed in the evaporation chamber 11, and the portion of the feed pipe 3 housed in the evaporation chamber 11 is provided with an outlet 31 so that the refrigerant can flow into the evaporation chamber 11 from the outlet 31. By inserting the feed pipe 3 into the evaporation chamber 11, the refrigerant can be conveniently sprayed onto the first peripheral wall 12, thereby absorbing the heat of the first peripheral wall 12.

[0041] In some embodiments, the portion of the feed pipe 3 housed in the evaporation chamber 11 is provided with a plurality of discharge ports 31, which are spaced apart. By providing a plurality of discharge ports 31, it is beneficial to spray the refrigerant more evenly onto the first peripheral wall 12.

[0042] For roller 2 mentioned above, please refer to... Figure 5The roller 2 has a second peripheral wall 21, with a first peripheral wall 12 located inside the second peripheral wall 21. Specifically, the second peripheral wall 21 is located on the periphery of the first peripheral wall 12 and surrounds the first peripheral wall 12. A heat-conducting medium is filled between the first peripheral wall 12 and the second peripheral wall 21. When the cold medium evaporates in the first peripheral wall 12, it can absorb heat from the second peripheral wall 21 through the first peripheral wall 12 and the heat-conducting medium. The surface of the second peripheral wall 21 facing away from the first peripheral wall 12 is used to contact the liquid, thereby condensing the liquid on the outer surface of the second peripheral wall 21 into ice. In this embodiment, by sleeved roller 2 on refrigeration stator 1 and allowing roller 2 to rotate relative to refrigeration stator 1, and by housing at least a portion of feed pipe 3 within evaporation chamber 11 and connecting exhaust pipe 4 to evaporation chamber 11, neither feed pipe 3 nor exhaust pipe 4 needs to rotate relative to refrigeration stator 1. This reduces the risk of wear between feed pipe 3 and refrigeration stator 1, and between exhaust pipe 4 and refrigeration stator 1, and improves the sealing performance between feed pipe 3 and refrigeration stator 1, and between exhaust pipe 4 and refrigeration stator 1, thereby reducing the risk of refrigerant leakage. In addition, by filling the space between the first peripheral wall 12 and the second peripheral wall 21 with a heat-conducting medium, on the one hand, the heat-conducting medium can have a lubricating effect, which helps reduce friction between roller 2 and refrigeration stator 1; on the other hand, the heat-conducting medium can improve the heat transfer efficiency between the first peripheral wall 12 and the second peripheral wall 21, thereby improving ice-making efficiency.

[0043] In some embodiments, the heat-conducting medium is heat-conducting oil or heat-conducting silicone oil.

[0044] In some embodiments, please refer to Figure 5 The first peripheral wall 12 and the second peripheral wall 21 are spaced apart to form a thermally conductive gap 9, in which the aforementioned thermally conductive medium is filled. In this embodiment, by providing a thermally conductive gap 9 between the first peripheral wall 12 and the second peripheral wall 21, it is beneficial to accommodate more thermally conductive medium, further improving the heat transfer efficiency between the first peripheral wall 12 and the second peripheral wall 21. In addition, the spaced-apart arrangement between the first peripheral wall 12 and the second peripheral wall 21 helps to reduce the risk of direct contact between them, thus reducing the risk of wear caused by friction between the first peripheral wall 12 and the second peripheral wall 21.

[0045] In some embodiments, please refer to Figure 5 The roller 2 is provided with a top wall 22 and a bottom wall 23, which are arranged opposite to each other. The top wall 22 is connected to one end of the second peripheral wall 21, and the bottom wall 23 is connected to the other end of the second peripheral wall 21. The top wall 22, the second peripheral wall 21 and the bottom wall 23 together enclose and form a receiving space 24, in which the cooling stator 1 is at least partially housed.

[0046] Specifically, the first peripheral wall 12 of the cooling stator 1 is housed in the receiving space 24.

[0047] It is worth noting that the ice on the outer surface of the second circumferential wall 21 is usually scraped off by a blade 500. Specifically, the blade 500 is fixed at a predetermined distance from the second circumferential wall 21, and as the roller 2 rotates, the blade 500 can scrape off the ice on the second circumferential wall 21. In related technologies, since the cold medium absorbs heat from both the top wall 22 and the bottom wall 23 during the evaporation process in the evaporation chamber 11, when there is liquid or water vapor on the surface of the top wall 22 or the bottom wall 23, ice is easily formed on the surface of the top wall 22 or the bottom wall 23, which increases the load on the roller 2 and thus increases energy consumption.

[0048] To at least partially solve the above problems, in some embodiments, the evaporator 100 further includes a first heat insulation member 5. The first heat insulation member 5 is disposed on the side of the top wall 22 near the bottom wall 23 and is located between the top wall 22 and the cooling stator 1. The first heat insulation member 5 is used to block heat transfer between the top wall 22 and the cooling stator 1, thereby reducing the risk of ice formation at the top wall 22, and thus reducing the risk of increased load on the drum 2, which is beneficial to reducing the energy consumption of the evaporator 100.

[0049] In some embodiments, the evaporator 100 further includes a second heat insulation member 6, which is disposed on the side of the bottom wall 23 near the top wall 22 and is located between the bottom wall 23 and the cooling stator 1. The second heat insulation member 6 is used to block heat transfer between the bottom wall 23 and the cooling stator 1, thereby reducing the risk of icing at the bottom wall 23 and further reducing the risk of increased load on the drum 2, which is beneficial to reducing the energy consumption of the evaporator 100.

[0050] In some embodiments, the first heat insulation element 5 is made of foam.

[0051] In some embodiments, the second insulation element 6 is made of foam.

[0052] In some embodiments, please refer to Figure 5 The roller 2 is provided with a sleeve portion 25, one end of which is connected to the top wall 22, and the other end of which extends away from the bottom wall 23. The refrigeration stator 1 is provided with a rotating shaft 13, and the sleeve portion 25 is sleeved on the rotating shaft 13 and can rotate around the rotating shaft 13. The rotating shaft 13 protrudes at least partially from the sleeve portion 25 so as to facilitate fixing the rotating shaft 13 to other components (such as the housing, bracket, etc. of the ice-making equipment).

[0053] In some embodiments, please refer to Figure 5The cooling stator 1 has a positioning protrusion 14 at the end away from the rotation shaft 13, and the bottom wall 23 of the roller 2 has a positioning groove 26 at the end near the top wall 22. The positioning protrusion 14 is at least partially received in the positioning groove 26, and the positioning protrusion 14 and the positioning groove 26 are rotatably engaged. In this embodiment, by providing the positioning protrusion 14 and the positioning groove 26, the positioning between the cooling stator 1 and the roller 2 is facilitated, thereby making it easier to assemble the cooling stator 1 and the roller 2. In addition, the rotatable engagement between the positioning protrusion 14 and the positioning groove 26 helps to improve the stability of the roller 2 during rotation.

[0054] In some embodiments, the positioning protrusion 14 is coaxial with the rotation shaft 13.

[0055] In some embodiments, the evaporator 100 further includes a bearing 7, the inner ring of which is sleeved on the rotating shaft 13, and the outer ring of which is connected to the sleeve portion 25, so that the roller 2 achieves a rotational connection with the rotating shaft 13 through the bearing 7.

[0056] In some embodiments, the evaporator 100 further includes a sealing ring 8, which is sleeved on the rotating shaft 13 and abuts against the sleeve portion 25. The sealing ring 8 is used to seal at least a portion of the gap between the sleeve portion 25 and the rotating shaft 13, thereby reducing the risk of leakage of the heat transfer medium.

[0057] In some embodiments, the feed pipe 3 passes through the rotating shaft 13, and at least a portion of the feed pipe 3 passes through the rotating shaft 13 and is housed in the evaporation chamber 11. That is, the feed pipe 3 extends from the rotating shaft 13 into the evaporation chamber 11. This arrangement can reduce the risk of the feed pipe 3 interfering with the rotation of the roller 2.

[0058] In some embodiments, the exhaust pipe 4 is at least partially inserted into the rotating shaft 13 and communicates with the evaporation chamber 11 so that the refrigerant, after evaporating into gas in the evaporation chamber 11, can be discharged from the exhaust pipe 4. By placing the exhaust pipe 4 on the rotating shaft 13, the risk of the exhaust pipe 4 interfering with the rotation of the drum 2 can be reduced.

[0059] In some embodiments, a drive shaft 28 is provided at the end of the bottom wall 23 of the roller 2 away from the top wall 22. The drive shaft 28 is coaxial with the rotating shaft 13. The drive shaft 28 is used to connect to the output shaft (not shown) of the motor so that the motor can drive the roller 2 to rotate through the drive shaft 28.

[0060] In this embodiment, by sleeved roller 2 on refrigeration stator 1 and allowing roller 2 to rotate relative to refrigeration stator 1, and by housing at least a portion of feed pipe 3 within evaporation chamber 11 and connecting exhaust pipe 4 to evaporation chamber 11, neither feed pipe 3 nor exhaust pipe 4 needs to rotate relative to refrigeration stator 1. This reduces the risk of wear between feed pipe 3 and refrigeration stator 1, and between exhaust pipe 4 and refrigeration stator 1, and improves the sealing performance between feed pipe 3 and refrigeration stator 1, and between exhaust pipe 4 and refrigeration stator 1, thereby reducing the risk of refrigerant leakage. Furthermore, by filling the space between the first peripheral wall 12 and the second peripheral wall 21 with a heat-conducting medium, the heat-conducting medium can provide lubrication, reducing friction between roller 2 and refrigeration stator 1. On the other hand, the heat-conducting medium can improve the heat transfer efficiency between the first peripheral wall 12 and the second peripheral wall 21, thereby improving ice-making efficiency.

[0061] This application also provides embodiments of ice-making equipment; please refer to [link / reference]. Figure 5 and Figure 6 The ice-making equipment includes a compressor 200, a condenser 300, a throttle valve 400, and the aforementioned evaporator 100. The outlet of the compressor 200 is connected to the inlet of the condenser 300, the inlet of the throttle valve 400 is connected to the outlet of the condenser 300, the feed pipe 3 of the evaporator 100 is connected to the outlet of the throttle valve 400, and the exhaust pipe 4 of the evaporator 100 is connected to the inlet of the compressor 200. The refrigerant is compressed into a high-temperature, high-pressure gas in the compressor 200. When it flows into the condenser 300, the condenser 300 condenses the high-temperature, high-pressure gas into a high-pressure, low-temperature liquid. Then, it flows into the throttle valve 400 to form a low-temperature, low-pressure liquid, which then flows into the evaporation chamber 11 of the evaporator 100 and evaporates into gas. The gas flows back into the compressor 200 through the exhaust pipe 4, forming a circulating flow of the refrigerant. When the cold medium evaporates in the evaporator 100, it absorbs heat from the drum 2, causing the liquid on the surface of the second circumferential wall 21 of the drum 2 to condense into ice, thereby realizing the production of ice.

[0062] In some embodiments, please refer to Figure 7 The ice-making equipment also includes a blade 500, which is fixed at a preset distance from the second peripheral wall 21 so that when the roller 2 rotates, the blade 500 can scrape the ice off the second peripheral wall 21 without having to scrape it off manually.

[0063] In some embodiments, the preset distance can be 1 to 3 centimeters.

[0064] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An evaporator, characterized by The evaporator comprises: a refrigeration stator provided with an evaporation cavity and a first peripheral wall, the first peripheral wall constituting part of the boundary of the evaporation cavity; a drum sleeved on the refrigeration stator, the drum being configured to rotate relative to the refrigeration stator, the drum having a second peripheral wall, the first peripheral wall being located in the second peripheral wall, and the first peripheral wall being filled with a heat-conducting medium between the first peripheral wall and the second peripheral wall; a feed pipe configured to allow a refrigerant medium to flow into the evaporation cavity; an exhaust pipe in communication with the evaporation cavity; the refrigeration stator is provided with a rotating shaft, the drum is provided with a sleeve portion, the sleeve portion is sleeved on the rotating shaft, and the sleeve portion is rotatable about the rotating shaft; the refrigeration stator is provided with a positioning protrusion at one end away from the rotating shaft, the drum is provided with a positioning groove, and the positioning protrusion is at least partially accommodated in the positioning groove; the feed pipe is provided through the rotating shaft, and the feed pipe is at least partially accommodated in the evaporation cavity, and the portion of the feed pipe accommodated in the evaporation cavity is provided with a discharge opening; the exhaust pipe is at least partially inserted into the rotating shaft.

2. The evaporator according to claim 1, wherein the drum further has a top wall and a bottom wall, the top wall is connected to one end of the second peripheral wall, the bottom wall is connected to the other end of the second peripheral wall, the top wall, the bottom wall and the second peripheral wall jointly enclose a containing space, and at least part of the refrigeration stator is accommodated in the containing space.

3. The evaporator of claim 2, wherein, The evaporator further comprises: a first heat insulation member, the first heat insulation member is arranged on one side of the top wall close to the bottom wall, and the first heat insulation member is located between the top wall and the refrigeration stator; and / or a second heat insulation member, the second heat insulation member is arranged on one side of the bottom wall close to the top wall, and the second heat insulation member is located between the bottom wall and the refrigeration stator.

4. The evaporator according to claim 1, wherein the evaporator further comprises a bearing, an inner ring of the bearing is sleeved on the rotating shaft, and an outer ring of the bearing is connected with the sleeve portion.

5. The evaporator according to claim 1, wherein the evaporator further comprises a sealing ring, the sealing ring is sleeved on the rotating shaft, and the sealing ring abuts against the sleeve portion.

6. The evaporator according to claim 1, wherein one end of the drum away from the sleeve portion is provided with a driving shaft, and the driving shaft is coaxial with the rotating shaft.

7. An ice making apparatus characterized by, The evaporator according to any one of claims 1-6, a compressor, a condenser, a throttle valve and the evaporator, an outlet of the compressor is in communication with an inlet of the condenser, an inlet of the throttle valve is in communication with an outlet of the condenser, the feed pipe of the evaporator is in communication with an outlet of the throttle valve, and the exhaust pipe of the evaporator is in communication with an inlet of the compressor.

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