Evaporator and smoothie maker

Abstract

The application relates to the technical field of ice making equipment, and discloses an evaporator and a smoothie maker. The evaporator comprises a cylinder shell, a first pipe, a second pipe and at least two micro-channel flat tubes. The cylinder shell has an inner circumferential surface; the second pipe and the first pipe are attached to the cylinder shell; the at least two micro-channel flat tubes are attached to the inner circumferential surface in a surrounding manner, and each micro-channel flat tube is arranged along the axial direction of the cylinder shell in sequence; each micro-channel flat tube is provided with at least two branch flow channels, the first end of each branch flow channel is communicated with the first pipe, and the second end of each branch flow channel is communicated with the second pipe. In the above manner, the evaporator can solve the technical problems of a small contact area between an evaporating pipe and a cylinder shell and low heat exchange efficiency in the related art.

Description

Technical Field

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

[0002] A smoothie maker is an appliance that transforms frozen liquids such as cola, wine, coffee, soda, juice, chocolate, and milk into semi-melted, semi-fine ice particles for consumption. The ice-making mechanism of a smoothie maker typically includes a compressor, condenser, and evaporator. The compressor and condenser are standard components, requiring only matching according to cooling efficiency requirements. The design of the evaporator determines the cooling heat exchange area and the magnitude of cold air conduction loss, directly affecting the overall cooling efficiency of the ice-making mechanism. In related technologies, the evaporator tubes on the evaporator contact the cylinder shell for heat conduction; however, this point contact results in a small contact area and low heat exchange efficiency. Utility Model Content

[0003] The purpose of this application is to provide an evaporator and a smoothie maker, which aims to improve the technical problems of low heat exchange efficiency caused by small contact area between the evaporator tube and the shell in related technologies.

[0004] According to a first aspect of this application, an evaporator is provided, comprising: The cylindrical shell has an inner circumferential surface; First tube; The second tube, like the first tube, is attached to the inside of the cylindrical shell; At least two microchannel flat tubes are attached around the inner circumferential surface, and each microchannel flat tube is arranged sequentially along the axial direction of the shell; each microchannel flat tube has at least two diversion channels, the first end of each diversion channel is connected to the first tube, and the second end of each diversion channel is connected to the second tube.

[0005] In some embodiments, the diversion channels are arranged parallel and spaced apart within the microchannel flat tube along the axial direction of the shell.

[0006] In some embodiments, the first tube has at least two independent first connecting channels, and the second tube has at least two independent second connecting channels; The first ends of the two branch channels are connected to the same first connecting channel, and the second ends of the two branch channels are connected to different second connecting channels. And / or, the second ends of both of the branch channels are connected to the same second connecting channel, and the first ends of the two branch channels are connected to different first connecting channels, thereby forming a refrigerant channel with continuous back-and-forth bends by at least two first connecting channels, at least two branch channels and at least two second connecting channels.

[0007] In some embodiments, the evaporator includes an inlet pipe and an outlet pipe; The inlet pipe is connected to the first pipe and extends out of the shell. The inlet pipe is connected to the initial first connecting channel. The inlet pipe has a first port, which is the inlet of the refrigerant channel. The outlet pipe is connected to the second pipe and extends out of the shell. The outlet pipe is connected to the second connecting channel at the end. The outlet pipe has a second port, which is the outlet of the refrigerant channel.

[0008] In some embodiments, the first tube and the second tube are arranged side by side along the circumference of the shell.

[0009] In some embodiments, the width of any of the microchannel flat tubes along the radial direction of the shell is in the range of 0.5 mm to 5 mm, and the width of any branch channel on any of the microchannel flat tubes is in the range of 0.2 mm to 2 mm.

[0010] In some embodiments, the shell is made of food-grade austenitic stainless steel.

[0011] In some embodiments, the shell includes a cylindrical body and an end wall; the cylindrical body has the inner circumferential surface and an opening on one side of the cylindrical body; the end wall is integrally formed on the outer periphery of the opening and protrudes outward along the radial direction of the shell; the end wall is used to cooperate with the body of the smoothie maker to fix the evaporator to the body of the smoothie maker.

[0012] In some embodiments, the motor mounting hole and the temperature sensor mounting hole are formed on the side wall of the cylinder opposite to the opening.

[0013] According to a second aspect of this application, a smoothie maker is provided, comprising: a smoothie maker body; an evaporator as described above; a cylindrical shell connected to the smoothie maker body; a first pipe connected to a capillary tube of the smoothie maker body; and a second pipe connected to a return air pipe of the smoothie maker body.

[0014] The beneficial effects of the embodiments of this application are as follows: The evaporator provided in this application has at least two microchannel flat tubes attached around the inner circumferential surface of the shell, replacing the coil structure of the evaporator in the related art. On the one hand, the wider flat tubes are conducive to fitting the inner circumferential surface, reducing the air gap formed between the coil and the inner circumferential surface, which can effectively reduce thermal resistance; on the other hand, the microchannel flat tubes have a higher surface area to volume ratio, and the effective heat exchange area is higher than that of the coil for the same volume. By utilizing the microscale effect of the microchannel structure, the thermal boundary layer thickness is reduced, further reducing thermal resistance and further improving heat exchange efficiency. Attached Figure Description

[0015] 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.

[0016] Figure 1 A schematic diagram illustrating the ice-making principle of a smoothie machine provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of an evaporator provided in one embodiment of the present application; Figure 3 for Figure 2 The front view of the evaporator is shown; Figure 4 for Figure 2 The exploded view of the evaporator structure is shown. Figure 5 for Figure 2 The diagram shows a cross-sectional view of the evaporator. Figure 6 for Figure 2 The diagram shows a cross-sectional view of the evaporator, illustrating the flow path of the refrigerant. Figure label: 1. Compressor; 2. Evaporator; 3. Condenser; 4. Dryer filter; 5. Capillary tube; 21. Shell; 211. Body; 2111. Outer circumferential surface; 2112. Inner circumferential surface; 211a. Opening; 211b. Temperature sensor mounting hole; 211c. Motor mounting hole; 212. End wall; 212a. Assembly hole; 22. Microchannel flat tube; 220. Flow channel; 221. Flat tube body; 222. Straight plate; 23. First pipe; 230. First connecting channel; 231. Main body of the first pipe; 232. First baffle; 24. Second pipe; 240. Second connecting channel; 241. Second pipe body; 242. Second baffle; 25. Inlet pipe; 26. Outlet tube; X, the axial direction of the shell. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0018] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0019] In the description of this application, it should be noted that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0020] In the description of this application, it should be noted that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0021] 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.

[0022] One embodiment of this application provides a smoothie maker, which includes a smoothie maker body and an evaporator 2. The smoothie maker body includes a casing, a compressor 1, a condenser 3, a dryer filter 4, a capillary tube 5, a return gas pipe, and an ice scraping mechanism. An ice-forming chamber is provided inside the casing, and a smoothie outlet is provided at the bottom of the ice-forming chamber. The compressor 1, condenser 3, dryer filter 4, capillary tube 5, and return gas pipe are all fixedly connected to the casing. The evaporator 2 is housed within the ice-forming chamber and fixedly connected to the casing. The compressor 1, condenser 3, dryer filter 4, capillary tube 5, evaporator 2, and return gas pipe are sequentially connected end-to-end to form a circulating refrigeration pipeline. The ice scraping mechanism includes an ice scraping motor and an ice scraping ring. The ice scraping motor is installed inside the evaporator 2, and its output end extends through the evaporator 2 into the ice-forming chamber. The ice scraping ring is coaxially arranged with the evaporator 2 and sleeved on the outer circumferential surface of the evaporator 2. The ice scraping ring is connected to the output end of the ice scraping motor.

[0023] To facilitate reader understanding, the following will combine... Figure 1 The refrigeration and ice-scraping process of a smoothie maker is briefly explained as follows: Compressor 1 compresses the refrigerant into a high-temperature, high-pressure gas, which is then sent to condenser 3. Condenser 3 cools the high-temperature, high-pressure gas into a high-pressure, medium-temperature liquid to be frozen, releasing heat. The high-pressure, medium-temperature liquid to be frozen is throttled and depressurized through capillary tube 5, becoming a low-temperature, low-pressure gas-liquid mixture. This low-temperature, low-pressure gas-liquid mixture enters evaporator 2, absorbs heat, and evaporates into gas. The evaporated gas returns to compressor 1 along the return pipe, completing a single refrigeration process. Simultaneously, evaporator 2 condenses the liquid to be frozen (such as water, juice, cola, or other liquid beverages) in the freezing chamber. The ice-scraping motor drives the ice-scraping ring to rotate around the central axis of evaporator 2, scraping away the ice layer adhering to the outer circumference of evaporator 2. The smoothie can then be dispensed from the smoothie outlet of the smoothie maker for the user to enjoy.

[0024] It should be noted that the compressor 1, condenser 3, dryer filter 4, capillary tube 5, and return pipe mentioned above are all general standard parts or refrigeration components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art from technical manuals. The specific structures of the casing and ice scraping mechanism are irrelevant to this application and will not be described in detail here.

[0025] Please see also Figures 2 to 6 One embodiment of this application provides an evaporator, which includes a shell 21, at least two microchannel flat tubes 22, a first tube 23, and a second tube 24. The at least two microchannel flat tubes 22, the first tube 23, and the second tube 24 are all disposed within the shell 21 and respectively contact the shell 21. Each microchannel flat tube 22 is connected to both the first tube 23 and the second tube 24. The at least two microchannel flat tubes 22, the first tube 23, and the second tube 24 together form a refrigerant channel for refrigerant to pass through. The first tube 23 can be connected to the aforementioned capillary tube, and the second tube 24 can be connected to the aforementioned return gas pipe.

[0026] In some embodiments, the shell 21 not only serves a water-blocking function, preventing the liquid to be frozen from entering the interior of the shell 21 and corroding the first tube 23, the second tube 24, and at least two microchannel flat tubes 22, but also has a heat-absorbing function. It can contact the liquid to be frozen, absorb the heat of the liquid to be frozen, and transfer it to the at least two microchannel flat tubes 22. Under the heat exchange of the refrigerant, the liquid to be frozen is transformed into ice slush in a semi-melted, semi-fine ice particle state.

[0027] For example, such as Figures 2 to 5As shown in any of the accompanying drawings, the shell 21 is generally a thin-walled cylindrical structure and includes a body 211 and an end wall 212. One side of the body 211 has an opening 211a, and the other side is closed. The body 211 has an outer peripheral surface 2111 and an inner peripheral surface 2112 facing away from each other. The outer peripheral surface 2111 is for contact with the liquid to be frozen, and the inner peripheral surface 2112 is for contact with the first tube 23, the second tube 24, and at least two microchannel flat tubes 22. The end wall 212 is integrally formed on the outer periphery of the opening 211a and protrudes radially outward along the shell 21. The end wall 212 is used to mate with the housing to fix the evaporator to the housing. The aforementioned structure of the shell 21 facilitates the assembly of other evaporator components through the opening 211a into the shell 21. When the evaporator is fixed to the housing, the opening 211a is sealed by the housing, which helps to prevent the liquid to be frozen from entering the interior of the shell 21. For example, the end wall 212 has a plurality of mounting holes 212a, which are arranged at intervals along the circumference of the shell 21. A plurality of fasteners pass through the plurality of mounting holes 212a and are screwed to the housing, thereby facilitating the assembly and disassembly of the evaporator. Of course, the method of fixing the shell 21 to the housing is not limited to this, and the end wall 212 can also be fixed to the housing by other means besides screwing.

[0028] Furthermore, the shell 21 has a temperature sensor mounting hole 211b for accommodating a temperature sensor. For example, as shown... Figure 2 or Figure 3 As shown, the temperature sensor mounting hole 211b is located on the side wall of the cylinder 211 opposite to the opening 211a. When the temperature sensor is installed in the temperature sensor mounting hole 211b, the temperature sensor's sensing probe extends out of the cylinder 21 and can detect the temperature of the outer circumferential surface 2111 of the cylinder 21. Thus, the controller of the smoothie machine adjusts the temperature to ensure that the smoothie is formed at the appropriate temperature.

[0029] Furthermore, the shell 21 has a motor mounting hole 211c for accommodating the ice scraper motor. For example, continuing as follows... Figure 2 or Figure 3 As shown, the motor mounting hole 211c is opened on the side wall of the cylinder 211 opposite to the opening 211a, so that the ice scraping motor can be hidden inside the cylinder shell 21 by means of a sealing component. The output end of the ice scraping motor extends out of the cylinder shell 21 through the motor mounting hole 211c and is connected to the ice scraping ring.

[0030] It is understood that the shape and structure of the shell 21 can be adapted to actual usage requirements, as long as it meets the requirements of serving as the mounting base for other components of the evaporator and not obstructing the rotation of the ice scraper ring. For example, in some other embodiments, the shell 21 differs from the structure described above in that it only includes the aforementioned cylindrical body 211 and is generally in the shape of a flattened cylinder. The side of the cylindrical body 211 with an opening 211a can be fixed to the housing by means of, but not limited to, insertion, bonding, welding, etc., and the opening 211a is sealed by the housing.

[0031] In some embodiments, the shell 21 is made of a metallic material, capable of rapidly absorbing heat from the liquid to be frozen upon contact and transferring it to at least two microchannel flat tubes 22. Exemplarily, the shell 21 is made of food-grade austenitic stainless steel, meeting safety standards for food contact materials and ensuring the quality and safety of the smoothie.

[0032] For at least two microchannel flat tubes 22, please combine Figure 6 See also Figure 4 or Figure 5 In some embodiments, at least two microchannel flat tubes 22 are all attached to the inner circumferential surface 2112, and each microchannel flat tube 22 is arranged sequentially along the axial direction X of the shell. At this time, each microchannel flat tube 22 is in contact with the inner circumferential surface 2112. Compared with the evaporator made by winding evaporation tubes in the related art, the contact area of ​​the evaporator of this application is larger, and the heat exchange efficiency is higher.

[0033] For example, the shapes of at least two microchannel flat tubes 22 are all conforming to the inner circumferential surface 2112. The first ends of at least two microchannel flat tubes 22 are integrally formed on the first tube 23, and the second ends of at least two microchannel flat tubes 22 are integrally formed on the second tube 24. That is, at least two microchannel flat tubes 22, the first tube 23, and the second tube 24 constitute an integral structure. Since the diameter of at least two microchannel flat tubes 22 is slightly larger than the diameter of the cylinder 211, after the integral structure is inserted into the cylinder 211 from the opening 211a, at least two microchannel flat tubes 22 can be interference-fitted with the inner circumferential surface 2112, so that at least two microchannel flat tubes 22 are all wrapped around the inner circumferential surface 2112. Of course, the connection method between at least two microchannel flat tubes 22, the first tube 23, and the second tube 24 is not limited to this. At least two microchannel flat tubes 22 can also be fixed to the first tube 23 and the second tube 24 respectively by welding, but not limited to welding.

[0034] It is understood that the fixing method of at least two microchannel flat tubes 22 to the inner circumferential surface 2112 can be adaptively adjusted according to actual usage requirements, as long as at least two microchannel flat tubes 22 are in contact with the inner circumferential surface 2112. For example, in some other embodiments, the structure of at least two microchannel flat tubes 22 differs from the above-mentioned structure in that the diameter of at least two microchannel flat tubes 22 is slightly smaller than the diameter of the cylinder 211, the at least two microchannel flat tubes 22 are clearance-fitted with the inner circumferential surface 2112, and each microchannel flat tube 22 is bonded and fixed to the inner circumferential surface 2112 and in contact with the inner circumferential surface 2112 by thermally conductive adhesive.

[0035] Furthermore, a thermally conductive material is filled between each microchannel flat tube 22 and its inner circumferential surface 2112, which can reduce the thermal resistance during the heat conduction process of the liquid to be frozen and further improve the heat exchange efficiency. Examples of such thermally conductive materials include thermal grease, thermal paste, or thermally conductive composite materials.

[0036] Please continue to combine Figure 6 See also Figure 5 In some embodiments, each microchannel flat tube 22 has at least two diversion channels 220. The first end of each diversion channel 220 is connected to the first tube 23, and the second end of each diversion channel 220 is connected to the second tube 24. The diversion channels 220 are arranged parallel and spaced apart within the microchannel flat tube 22 along the axial direction X of the shell.

[0037] For example, continue as follows Figure 5 As shown, each microchannel flat tube 22 can be a thin-walled flat square tube structure, and the thickness dimension of each flat tube body 221 is smaller than its length and width dimensions. Each microchannel flat tube 22 includes a flat tube body 221 and at least one straight plate 222. Each flat tube body 221 is attached to the inner circumferential surface 2112, and each flat tube body 221 is arranged sequentially along the axial direction X of the shell. At least two straight plates 222 of each microchannel flat tube 22 are arranged parallel to each other along the axial direction X of the shell, and at least one straight plate 222 divides each flat tube body 221 into at least two flow channels 220. The first tube 23 is connected to the second tube 24 through at least three flow channels 220. It should be noted that the arrangement of at least two straight plates 222 parallel to each other along the axial direction X of the shell can be understood as any two adjacent straight plates 222 being completely parallel, or the angle between any two adjacent straight plates 222 being within 5°. This deviation angle may be caused by manufacturing errors, etc.

[0038] When refrigerant flows through each branch channel 220, the cross-sectional size of the branch channel 220 is very small. This allows the refrigerant pressure to be evenly distributed across all areas of the microchannel flat tube 22, thereby reducing the refrigerant flow pressure. Furthermore, the smaller size of the branch channels 220 increases the heat exchange area of ​​the evaporator, improving heat exchange efficiency. In addition, utilizing the microscale effect of the microchannel structure, the thermal boundary layer thickness is reduced, further lowering thermal resistance and further enhancing heat exchange efficiency.

[0039] Of course, the specific structure of the microchannel flat tube 22 is not limited to this. The cross-sectional shape of the microchannel flat tube 22 can be oblong, and the cross-sectional shape of each branch channel 220 is also oblong.

[0040] Continue as Figure 5 As shown, in some embodiments, the width W1 of any microchannel flat tube along the radial direction of the shell 21 is in the range of 0.5mm to 5mm. The width W2 of any branch channel on any microchannel flat tube 22 is in the range of 0.2mm to 2mm. Limiting the width of each microchannel flat tube 22 and the width of the branch channel 220 on each microchannel flat tube to the aforementioned numerical range further ensures the flow velocity of the refrigerant and makes the heat exchange of the refrigerant more uniform. As an example, W1 can be listed as 0.5mm, 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 3mm, 4mm, 4.8mm, 5mm or any two of the numerical ranges, and W2 can be listed as 0.2mm, 0.4mm, 0.5mm, 0.8mm, 1mm, 1.5mm, 1.9mm, 2mm or any two of the numerical ranges.

[0041] For tube 23 and tube 24, please refer to the following: Figures 2 to 4 In some embodiments, as shown in any of the accompanying drawings, the first tube 23 and the second tube 24 are arranged side by side along the circumference of the shell 21, thereby making the arrangement of at least two microchannel flat tubes 22 more reasonable, thus further increasing the heat exchange area of ​​the evaporator and further improving the heat exchange efficiency.

[0042] The first tube 23 has at least two independent first connecting channels 230. For example, continuing as follows... Figure 6 As shown, the first tube 23 includes a first tube body 231 and at least one first partition 232. The first tube body 231 is connected to each of the flat tube bodies 221 and is attached to the inner circumferential surface 2112. At least one first partition 232 is arranged parallel to and spaced apart along the axial direction X of the shell, and the at least one first partition 232 divides the first tube body 231 into at least two first connecting channels 230, and the same first connecting channel 230 is connected to the first end of the two branch channels 220.

[0043] The second pipe 24 has at least two independent second connecting channels 240. For example, continuing as follows... Figure 6 As shown, the second tube 24 includes a second tube body 241 and at least one second partition 242. The second tube body 241 is connected to each of the flat tube bodies 221, and is attached to the inner circumferential surface 2112, and is arranged side by side with the first tube body 231 along the circumferential direction of the shell 21. At least one second partition 242 is arranged parallel to and spaced apart along the axial direction X of the shell, and divides the second tube body 241 into at least two second connecting channels 240. Different second connecting channels 240 are connected to the second ends of two branch channels 220, so that at least two second connecting channels 240, at least four branch channels 220 and at least two first connecting channels 230 form a... Figure 6 The continuously reciprocating and tortuous refrigerant flow channels shown increase the refrigerant flow time, allowing for sufficient heat exchange and uniform temperature distribution within each branch channel 220. This avoids localized overheating or undercooling and ensures uniform cooling of the liquid to be frozen.

[0044] Of course, such as Figure 6 The continuously reciprocating refrigerant flow channel shown is not limited to being formed in the manner described above. As long as sufficient heat exchange of the refrigerant can be ensured, for example, in some other embodiments, the second ends of the two branch channels 220 are both connected to the same second connecting channel 240, and the first ends of the two second branch channels 220 are connected to different first connecting channels 230, which can also form the aforementioned continuously reciprocating refrigerant flow channel.

[0045] like Figure 2 or Figure 4 As shown, to facilitate the connection of the refrigerant flow channel to the capillary tube, in some embodiments, the evaporator includes an inlet pipe 25. The inlet pipe 25 is connected to the first pipe 23 and extends outside the shell 21, and is connected to the initial first connecting flow channel 230. Exemplarily, the first end of the inlet pipe 25 is fixed to the first pipe body 231 by welding, but not limited to welding, and is connected to the initial first connecting flow channel 230. The second end of the inlet pipe 25 extends outside the opening 211a of the shell 211. The port of the second end of the inlet pipe 25 is the first port, which is the inlet of the refrigerant flow channel. The first port is adapted to the opening of the capillary tube to connect to the capillary tube.

[0046] Continue as Figure 2 or Figure 4As shown, to facilitate the connection of the refrigerant flow path to the return gas pipe, in some embodiments, the evaporator includes an outlet pipe 26. The outlet pipe 26 is connected to the second pipe 24 and extends out of the shell 21, and the outlet pipe 26 is connected to the second connecting flow path 240 at the end. Exemplarily, the first end of the outlet pipe 26 is fixed to the second pipe body 241 by welding, but not limited to, and connected to the first connecting flow path 230 at the end, and the second end of the outlet pipe 26 extends out of the opening 211a of the shell 211. The port of the second end of the outlet pipe 26 is the second port, which is the outlet of the refrigerant flow path. The second port is adapted to the opening of the return gas pipe to connect to the return gas pipe.

[0047] In some embodiments, the first tube 23, the inlet tube 25, the at least two microchannel flat tubes 22, the second tube 24, and the outlet tube 26 are made of metal, enabling rapid heat transfer to the refrigerant. Exemplarily, the first tube 23, the inlet tube 25, the at least two microchannel flat tubes 22, the second tube 24, and the outlet tube 26 are all made of aluminum, which reduces the manufacturing cost of the evaporator.

[0048] In summary, the evaporator provided in this application has at least two microchannel flat tubes 22 attached around the inner circumferential surface 2112 of the shell 21, replacing the coil structure of evaporators in related technologies. On the one hand, the wider flat tubes are beneficial for fitting the inner circumferential surface 2112, reducing the air gap formed between the coil and the inner circumferential surface 2112, which can effectively reduce thermal resistance; on the other hand, the microchannel flat tubes 22 have a higher surface area to volume ratio, resulting in a higher effective heat transfer area than coils of the same volume. By utilizing the microscale effect of the microchannel structure, the thermal boundary layer thickness is reduced, further reducing thermal resistance and further improving heat transfer efficiency.

[0049] 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 in that, include: The cylindrical shell has an inner circumferential surface; First tube; The second tube, like the first tube, is located inside the cylindrical shell; At least two microchannel flat tubes are attached around the inner circumferential surface, and each microchannel flat tube is arranged sequentially along the axial direction of the shell; each microchannel flat tube has at least two diversion channels, the first end of each diversion channel is connected to the first tube, and the second end of each diversion channel is connected to the second tube.

2. The evaporator according to claim 1, characterized in that, Along the axial direction of the cylindrical shell, the diversion channels are arranged parallel to each other and spaced apart within the microchannel flat tube.

3. The evaporator according to claim 1, characterized in that, The first tube has at least two independent first connecting channels, and the second tube has at least two independent second connecting channels; The first ends of the two branch channels are connected to the same first connecting channel, and the second ends of the two branch channels are connected to different second connecting channels. And / or, the second ends of both of the branch channels are connected to the same second connecting channel, and the first ends of the two branch channels are connected to different first connecting channels, thereby forming a refrigerant channel with continuous back-and-forth bends by at least two first connecting channels, at least two branch channels and at least two second connecting channels.

4. The evaporator according to claim 3, characterized in that, The evaporator includes an inlet pipe and an outlet pipe; The inlet pipe is connected to the first pipe and extends out of the shell. The inlet pipe is connected to the initial first connecting channel. The inlet pipe has a first port, which is the inlet of the refrigerant channel. The outlet pipe is connected to the second pipe and extends out of the shell. The outlet pipe is connected to the second connecting channel at the end. The outlet pipe has a second port, which is the outlet of the refrigerant channel.

5. The evaporator according to any one of claims 1-3, characterized in that, The first tube and the second tube are arranged side by side along the circumference of the shell.

6. The evaporator according to any one of claims 1-3, characterized in that, Along the radial direction of the shell, the width of any of the microchannel flat tubes is in the range of 0.5mm to 5mm, and the width of any branch channel on any of the microchannel flat tubes is in the range of 0.2mm to 2mm.

7. The evaporator according to any one of claims 1-3, characterized in that, The shell is made of food-grade austenitic stainless steel.

8. The evaporator according to claim 7, characterized in that, The shell includes a cylindrical body and an end wall; the cylindrical body has the inner circumferential surface, and one side of the cylindrical body is provided with an opening; the end wall is integrally formed on the outer periphery of the opening and protrudes outward along the radial direction of the cylindrical body; the end wall is used to cooperate with the body of the smoothie machine to fix the evaporator to the body of the smoothie machine.

9. The evaporator according to claim 8, characterized in that, The motor mounting hole and the temperature sensor mounting hole are opened on the side wall of the cylinder opposite to the opening.

10. A smoothie maker, characterized in that, include: The smoothie machine itself; The evaporator as described in any one of claims 1-9; The cylindrical shell is connected to the body of the smoothie maker, the first pipe is connected to the capillary tube of the body of the smoothie maker, and the second pipe is connected to the return air pipe of the body of the smoothie maker.

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