Evaporator and cold drink equipment

Abstract

The invention discloses an evaporator and cold drink equipment, the evaporator comprises an evaporation cylinder, an air return pipe and a communicating pipe, the air return pipe and the communicating pipe are communicated with the evaporation cylinder, an evaporation cavity is arranged in the evaporation cylinder, the air return pipe is communicated with an external compressor, an air return section of the air return pipe is connected with the evaporation cylinder and is communicated with the evaporation cavity, and the communicating pipe is communicated with the communicating pipe. The communicating pipe is communicated with an external condenser or a throttling component, a spraying section of the communicating pipe is connected with the air return section and communicated with the evaporation cavity, an oil return part is arranged in the evaporation barrel, the outlet end of the oil return part can be communicated with the air return section, the inlet end of the oil return part is close to the inner side wall of the evaporation barrel, and the oil return part is communicated with the oil return part. And the oil return piece can rotate along with the evaporation cylinder. The cold drink equipment comprises the evaporator. By adopting the oil return device, oil can be effectively returned, and the oil return efficiency is improved, so that the normal operation of the compressor and the heat transfer efficiency of the evaporator are ensured, and the external space of the evaporator is not occupied.

Description

Technical Field

[0001] This invention relates to the field of cold drink equipment technology, and more particularly to an evaporator and cold drink equipment. Background Technology

[0002] In the refrigeration systems of beverage machines such as smoothie makers and shaved ice machines, the oil return performance of the evaporator directly affects the reliability of the compressor and the system's energy efficiency. Existing evaporators in beverage machines mostly adopt a straight-through return gas structure design: the return gas pipe is directly connected to the evaporation chamber, and the lubricating oil carried by the refrigerant naturally separates with the airflow within the evaporation chamber and passively returns to the compressor due to the refrigerant flow. However, this structure has the following drawbacks: the evaporator is usually cylindrical, and when installed horizontally or at an angle, the lubricating oil tends to stagnate at the bottom of the evaporation chamber. Especially under low-load conditions, the reduced refrigerant flow rate causes an oil film to adhere to the inner wall of the evaporator cylinder, making effective return difficult and reducing oil return efficiency. Simultaneously, lubricating oil adhering to the inner wall of the evaporator cylinder increases thermal resistance, reducing heat transfer efficiency and cooling effect. To improve the oil return effect, existing evaporators typically require the addition of an external oil separator or complex spiral guide vanes. This not only increases the equipment size and manufacturing cost but also weakens the evaporator's heat exchange performance due to the interference of the flow field caused by the additional components. Especially for small devices such as home blenders, traditional oil return solutions are difficult to implement due to limited space. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an evaporator that can effectively return oil and improve oil return efficiency, thereby ensuring the normal operation of the compressor and the heat transfer efficiency of the evaporator, without occupying the external space of the evaporator.

[0004] To solve the above-mentioned technical problems, the present invention provides an evaporator, including an evaporation cylinder and a return gas pipe and a connecting pipe communicating with the evaporation cylinder, wherein the evaporation cylinder is connected to the return gas pipe and the connecting pipe respectively.

[0005] The evaporator is provided with an evaporation chamber. The return gas pipe is connected to an external compressor. The return gas section of the return gas pipe is connected to the evaporator and communicates with the evaporation chamber. The connecting pipe is connected to an external condenser or throttling device. The spray section of the connecting pipe is connected to the return gas section and communicates with the evaporation chamber.

[0006] The evaporator is equipped with an oil return component. The outlet end of the oil return component can communicate with the gas return section, and the inlet end of the oil return component is close to the inner wall of the evaporator. The oil return component can rotate with the evaporator.

[0007] As an improvement to the above solution, the outlet end of the oil return component is located in the middle of the end of the evaporator cylinder, and the inlet end of the oil return component is located on the peripheral edge of the end of the evaporator cylinder.

[0008] As an improvement to the above solution, a return air hole is provided on the side wall of the return air section, all or part of the return air hole is located in the evaporation chamber, the oil return component is provided on the side of the return air hole, and the outlet end of the oil return component can communicate with the return air hole.

[0009] As an improvement to the above solution, one end of the evaporator is provided with a first side cover, which can rotate with the evaporator. The outlet end of the oil return component is located in the middle of the first side cover, and the inlet end of the oil return component is located on the peripheral edge of the first side cover. The oil return component can rotate with the first side cover.

[0010] As an improvement to the above solution, an oil collection groove is provided on one side of the oil return component, and a hook-shaped groove is provided at one end of the oil return component located on the peripheral edge of the first side cover. The hook-shaped groove extends outward from the side of the oil return component and forms a concave structure in the shape of a "7" or an arc at the end. The hook-shaped groove is connected to the oil collection groove. When the first side cover rotates, the hook-shaped groove can scoop compressor oil into the oil collection groove.

[0011] As an improvement to the above solution, when the evaporator drives the oil return component to rotate, one end of the oil return component located in the middle of the first side cover can correspond to the position of the air return hole, and the end of the oil collection groove can communicate with the air return hole.

[0012] As an improvement to the above solution, the first side cover is also provided with a side fixing platform. The side fixing platform protrudes from the side of the first side cover and surrounds the periphery of the return air pipe. A clearance groove is provided on one side of the side fixing platform. The position of the clearance groove corresponds to the position of the return air hole. One end of the oil return component located in the middle of the first side cover is provided in the clearance groove or on the side of the clearance groove. The oil collection groove can communicate with the clearance groove.

[0013] As an improvement to the above solution, both the ejection section and the return gas section are inserted into the evaporation chamber, the ejection section is located inside the return gas section, and the return gas section is slidably sealed to the first side cover.

[0014] As an improvement to the above solution, the ejection section includes an ejection connection end and an ejection communication end located in the evaporation chamber, the return gas section includes a return gas connection end and a return gas communication end located in the evaporation chamber, the ejection connection end is fixed to the return gas connection end, and the ejection communication end passes through the return gas section and is connected to the return gas connection end.

[0015] As an improvement to the above solution, the return gas pipe further includes a support section, one end of which is connected to an external compressor, and the other end of which is connected to the side of the return gas connection end. Part of the connecting pipe is spirally wound in the support section, and the ejection connection end enters the return gas section from the end of the return gas connection end.

[0016] As an improvement to the above solution, the end of the return gas connection is provided with a cap, the ejection connection passes through the cap from the return gas section and communicates with the evaporation chamber, and the ejection connection extends from the middle of the evaporation cylinder toward the side wall of the evaporation cylinder.

[0017] As an improvement to the above solution, the evaporator further includes a mounting assembly, which includes a mounting plate, a bearing, and a connecting shaft. The mounting plate has a first mounting hole, the outer ring of the bearing is fixed in the first mounting hole, one end of the connecting shaft is fixed to the inner ring of the bearing, and the other end of the connecting shaft is connected to the end of the evaporator cylinder opposite to the first side cover. The mounting plate can be fixed to the outer shell of the cold drink equipment.

[0018] As an improvement to the above solution, the evaporator further includes a second side cover, which is located at one end of the evaporator opposite to the first side cover. The ejection section and the return section both pass through the first side cover and are located inside the evaporation chamber. The end of the ejection section is located on the side of the second side cover, and the end of the return section is located on the side of the first side cover.

[0019] The present invention also provides a cold drink device, including an evaporator as described above.

[0020] Implementing this invention has the following beneficial effects:

[0021] The evaporator of the present invention is provided with an evaporating cylinder, a return gas pipe and a connecting pipe. The evaporating cylinder is provided with an evaporation chamber. After the external compressor introduces refrigerant into the external condenser, the refrigerant enters the evaporating cylinder through the connecting pipe for evaporation and refrigeration. During this process, the evaporating cylinder rotates to make ice. The evaporated refrigerant returns to the compressor through the return gas pipe to form a cycle. The lubricating oil that enters the evaporator along with the refrigerant will remain inside the evaporator and collect at the bottom. The evaporator is equipped with an oil return component. When the inlet end of the oil return port moves to a high position, the outlet end of the oil return component can communicate with the gas return section. The inlet end of the oil return component is close to the inner wall of the evaporator. The oil return component can rotate with the evaporator. Each time it rotates, the oil return component passes through the bottom of the evaporator and scrapes up the lubricating oil on the bottom inner wall. When it rotates to a high position, under the action of gravity, the lubricating oil can flow into the gas return section along the oil return component, thus forming an oil return. After repeated rotation and oil scraping, a high-efficiency oil return can be formed, ensuring the normal operation of the compressor and preventing lubricating oil from remaining at the bottom of the evaporator, thus ensuring the heat transfer efficiency of the evaporator. In addition, the oil return component is located inside the evaporator and does not occupy external space, which can save space, reduce volume, and meet the needs of household cold drink equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the disassembled structure of the evaporator of the present invention;

[0023] Figure 2 This is a schematic diagram of the rotational action of the oil scraper of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the oil scraper and the air return hole of the present invention.

[0025] Figure 4 yes Figure 3 A magnified view of part A in the image;

[0026] Figure 5 This is a cross-sectional structural schematic diagram of the first embodiment of the evaporator of the present invention;

[0027] Figure 6 This is a cross-sectional structural schematic diagram of the second embodiment of the evaporator of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside, and outside used in this text are based solely on the accompanying drawings and are not intended to specifically limit the invention.

[0029] See Figure 1This invention discloses an evaporator, including an evaporator cylinder 1 and a return gas pipe 2 and a connecting pipe 3 connected to the evaporator cylinder 1. The connection structure between the evaporator cylinder 1 and the return gas pipe 2 and the connecting pipe 3 adopts an axial connection structure, and the evaporator cylinder 1 is connected to the return gas pipe 2 and the connecting pipe 3 respectively.

[0030] The evaporator cylinder 1 is equipped with an evaporation chamber 11, where the refrigerant evaporates and absorbs heat to produce cooling. The outer wall of the evaporator cylinder 1 is also cooled to produce ice. The return gas pipe 2 is connected to an external compressor, allowing the refrigerant evaporated in the evaporation chamber 11 to return to the compressor for the next cycle. The return gas section 21 of the return gas pipe 2 is connected to the evaporator cylinder 1 and communicates with the evaporation chamber 11. The connecting pipe 3 is connected to an external condenser or throttling device. When the connecting pipe 3 is connected to an external condenser, it is preferably a capillary tube, which has a throttling effect. The ejection section 31 of the connecting pipe 3 is connected to the return gas section 21 and communicates with the evaporation chamber 11, allowing the throttled refrigerant or the refrigerant throttled in the connecting pipe 3 to be sent into the evaporation chamber 11 for evaporation.

[0031] Compressors require a significant amount of lubricating oil to operate. During the refrigeration system's operation, the refrigerant carries the lubricating oil, which migrates to components such as the condenser and evaporator. If this migrated oil cannot be effectively returned to its source, the amount of lubricating oil in the compressor decreases, ultimately leading to wear and tear and a reduced lifespan. Furthermore, lubricating oil adhering to the inner walls of the condenser or evaporator increases their thermal resistance, affecting heat transfer efficiency. See also... Figure 2 To improve the refrigerant oil return efficiency within the evaporator cylinder 1, an oil return component 4 is provided inside the evaporator cylinder 1. When the inlet end of the oil return port moves to a high position, the outlet end of the oil return component 4 can communicate with the gas return section 21. The inlet end of the oil return component 4 is close to the inner wall of the evaporator cylinder 1, that is, the oil return component 4 extends to the vicinity of the cylinder wall of the evaporator cylinder 1, and the oil return component 4 can rotate with the evaporator cylinder 1. When the evaporator cylinder 1 rotates, the oil return component 4 rotates accordingly. When the inlet end of the oil return component 4 moves to a low position, the inlet end of the oil return component 4 can scrape the bottom inner wall of the evaporator cylinder 1 once, thereby scraping up the lubricating oil film adhering to the bottom of the inner wall to form oil droplets. When the inlet end of the oil return component 4 rotates to a high position, the lubricating oil accumulated at the inlet end of the oil return component 4 flows into the interior of the gas return section 21 under the action of gravity through the outlet end of the oil return component 4, and finally returns to the compressor with the refrigerant flow. The continuous rotating scraping action of the oil return component 4 can effectively remove the residual oil film on the inner wall of the evaporation chamber 11, maintain the direct heat exchange capacity of the metal surface, and improve the oil return efficiency.

[0032] The beneficial effects of the embodiments of the present invention are as follows:

[0033] In this embodiment of the invention, the evaporator is provided with an evaporator cylinder 1, a return gas pipe 2, and a connecting pipe 3. The evaporator cylinder 1 is provided with an evaporation chamber 11. After the external compressor introduces refrigerant into the external condenser, the refrigerant enters the evaporator cylinder 1 through the connecting pipe 3 for evaporation and refrigeration. During this process, the evaporator cylinder 1 rotates to make ice, and the evaporated refrigerant returns to the compressor through the return gas pipe 2 to form a cycle. The lubricating oil that enters the evaporator cylinder 1 with the refrigerant will remain inside the evaporator cylinder 1 and collect at the bottom of the evaporator cylinder 1. The evaporator cylinder 1 is equipped with an oil return component 4. When the inlet end of the oil return port moves to the high position, the outlet end of the oil return component 4 can communicate with the gas return section 21. The inlet end of the oil return component 4 is close to the inner wall of the evaporator cylinder 1. The oil return component 4 can rotate with the evaporator cylinder 1. Each time it rotates, the oil return component 4 passes through the bottom of the evaporator cylinder 1 and scrapes up the lubricating oil on the bottom inner wall. When it rotates to the high position, under the action of gravity, the lubricating oil can flow into the gas return section 21 along the oil return component 4, thereby forming an oil return. After repeated rotation and oil scraping, a high-efficiency oil return can be formed, ensuring the normal operation of the compressor and preventing lubricating oil from remaining at the bottom of the evaporator cylinder 1, thus ensuring the heat transfer efficiency of the evaporator. In addition, the oil return component 4 is located inside the evaporator cylinder 1 and does not occupy external space, which can save space, reduce volume, and meet the needs of household cold drink equipment.

[0034] See Figure 2 The outlet end of the oil return component 4 is located in the middle of the end of the evaporator cylinder 1, specifically in the inner wall of the end of the evaporator cylinder 1 near the rotating shaft, which facilitates the lubricating oil to enter the gas return section 21 from the outlet end. The inlet end of the oil return component 4 is located on the peripheral edge of the end of the evaporator cylinder 1, which facilitates the periodic movement of the inlet end to the bottom area of ​​the evaporator cylinder 1 and the periodic movement of the inlet end to the upper area of ​​the evaporator cylinder 1.

[0035] See Figure 3 and Figure 4 The side wall of the return gas section 21 is provided with a return gas hole 211. All or part of the return gas hole 211 is located in the evaporation chamber 11, which can provide return gas for the evaporated refrigerant. It can also accelerate the flow of lubricating oil from the outlet end of the oil return component 4 to the return gas hole 211 through the negative pressure effect in the return gas section 21. The oil return component 4 is located on the side of the return gas hole 211. When the inlet end of the oil return port moves to a high position, the outlet end of the oil return component 4 can communicate with the return gas hole 211. Through the close proximity design, the scraped lubricating oil can drip directly into the return gas hole 211 and enter the compressor through the return gas hole 211, avoiding secondary deposition of oil droplets in the evaporation chamber 11.

[0036] See Figure 5In the first embodiment of the present invention, one end of the evaporator cylinder 1 is provided with a first side cover 12. The first side cover 12 can rotate with the evaporator cylinder 1. When the first side cover 12 rotates synchronously with the evaporator cylinder 1, it can simultaneously drive the inlet end and outlet end of the oil return component 4 to move. The outlet end of the oil return component 4 is located in the middle of the first side cover 12, and the inlet end of the oil return component 4 is located on the peripheral edge of the first side cover 12. The oil return component 4 can rotate with the first side cover 12. By utilizing the periodic action of low-level oil scraping and high-level flow guiding during rotation, a continuous oil return cycle is formed.

[0037] See Figure 3 and Figure 4 The oil return component 4 has an oil collection groove 41 on one side, which can accommodate lubricating oil. The oil collection groove 41 also guides the lubricating oil from the inlet to the outlet of the oil return component 4. For efficient oil scraping, a hook-shaped groove 42 is provided at one end of the oil return component 4 located on the peripheral edge of the first side cover 12. The hook-shaped groove 42 extends outward from the side of the oil return component 4 and forms a "7"-shaped or arc-shaped concave structure at its end. When rotated, the "7"-shaped or arc-shaped concave structure can penetrate deep into the oil layer at the bottom of the evaporator cylinder 1, guiding the accumulated lubricating oil into the oil collection groove 41 through a "scooping" action. Simultaneously, the "7"-shaped or arc-shaped concave structure facilitates the transition of lubricating oil from the hook-shaped groove 42 into the oil collection groove 41. The hook-shaped groove 42 communicates with the oil collection groove 41, and when the first side cover 12 rotates, the hook-shaped groove 42 can scoop compressor oil into the oil collection groove 41.

[0038] See Figure 2 When the evaporator 1 drives the oil return component 4 to rotate, when the hook-shaped groove 42 moves to a high position, one end of the oil return component 4 located in the middle of the first side cover 12 can correspond to the position of the air return hole 211. At this time, the oil return component 4 is in an inclined or vertical state, and the end of the oil collection groove 41 can be aligned with the air return hole 211, thereby achieving communication with the air return hole 211.

[0039] See Figure 3The first side cover 12 is also provided with a side fixing platform 13. The side fixing platform 13 protrudes from the side of the first side cover 12 and surrounds the periphery of the return air pipe 2. The side fixing platform 13 is used to fix the oil return component 4 and protect the return air section 21. A clearance groove 131 is provided on one side of the side fixing platform 13. The position of the clearance groove 131 corresponds to the position of the return air hole 211. The groove opening cross-section of the clearance groove 131 is larger than the opening cross-section of the return air hole 211, so that the lubricating oil in the oil collection groove 41 can drip into the return air hole 211 through the clearance groove 131. One end of the oil return component 4 located in the middle of the first side cover 12 is provided in the clearance groove 131 or on the side of the clearance groove 131. When the hook-shaped groove 42 moves to the high position, the oil collection groove 41 can communicate with the clearance groove 131.

[0040] See Figure 4 The ejection section 31 includes an ejection connection end 311 and an ejection communication end 312 located in the evaporation chamber 11. The return gas section 21 includes a return gas connection end 212 and a return gas communication end 213 located in the evaporation chamber 11. The ejection connection end 311 is fixed to the return gas connection end 212. The ejection communication end 312 passes through the return gas section 21 and is connected to the return gas connection end 212. By using an axial nesting structure, the ejector section 31 and the return section 21 are coaxially integrated, thus completely embedding the refrigerant delivery path of the ejector section 31 inside the cavity of the return section 21. This avoids the need for additional external piping and significantly reduces the lateral or radial space occupied by the overall evaporator structure. At the same time, by using the wall of the return section 21 as a mechanical support for the ejector section 31, the refrigerant flow path from the ejector section 31 to the evaporator cavity 11 directly passes through the interior of the return section 21, eliminating the bending space required by traditional split piping arrangements. This achieves a compact axial dimension of the evaporator, further reducing the size of the equipment and meeting the needs of household appliances.

[0041] In addition, due to the coaxial integrated layout, compared with the traditional spiral winding layout, the resistance of the refrigerant flowing in the injection section 31 and the return section 21 can be reduced, and the impact of the fluctuation of the intake pressure and return pressure on the heat exchange efficiency of the evaporator chamber 11 can be balanced.

[0042] Furthermore, the return gas pipe 2 also includes a support section 22. One end of the support section 22 is connected to an external compressor, and the other end is connected to the side of the return gas connection end 212. The support section 22 is inclined or perpendicular to the return gas connection end 212. The support section 22 can connect and fix the return gas connection end 212. At the same time, part of the connecting pipe 3 is spirally wound in the support section 22. The support section 22 can fix the connecting pipe 3. At the same time, the spiral winding method reduces the arrangement space of the connecting pipe 3 and ensures the stability of the connecting pipe 3. The ejection connection end 311 enters the return gas section 21 from the end of the return gas connection end 212, so that the flow path of the refrigerant from the ejection section 31 to the evaporator chamber 11 directly passes through the interior of the return gas section 21. This eliminates the bending space required by the traditional split-type pipeline arrangement, realizes the compactness of the axial dimension of the evaporator, and reduces the friction resistance of the traditional spiral winding pipeline arrangement, improving the refrigerant flow.

[0043] See Figure 3 The end of the return gas connection 213 is provided with a cap 23. The ejection connection 312 passes through the cap 23 from the return gas section 21 and communicates with the evaporation chamber 11. The cap 23 seals the axial position of the return gas connection 213. During return gas, the return gas flows into the return gas hole 211 through the gap between the side fixing platform 13 and the return gas pipe 2. The return gas connection 213 located in the evaporation chamber 11 returns gas through the return gas hole 211 on the side wall. The cap 23 not only fixes the ejection connection 312, but also prevents the refrigerant ejected from the ejection connection 312 from directly returning to the axial direction of the return gas connection 213, thus avoiding a "short circuit". Specifically, the ejector end 312 extends from the middle of the evaporator cylinder 1 toward the side wall of the evaporator cylinder 1. The end of the ejector end 312 forms a "7" shape. The refrigerant is ejected from the ejector end 312 and sprayed toward the side wall of the evaporator cylinder 1 so that the refrigerant can quickly diffuse and evaporate in the evaporator chamber 11. Since the air inlet of the return section 21 is the return air hole 211 located in the side fixed platform 13, the two are far apart. Because it is far away from the return air hole 211, the refrigerant can be fully evaporated in the evaporator chamber 11 and then return through the return air hole 211.

[0044] See Figure 6In the second embodiment, the distance between the ejection connection end 312 and the return gas connection end 213 is further increased. Specifically, the evaporator cylinder 1 also includes a second side cover 14, which is located at the end of the evaporator cylinder 1 opposite to the first side cover 12. The ejection section 31 and the return gas section 21 both pass through the first side cover 12 and are located inside the evaporation chamber 11. The end of the ejection section 31 is located on the side of the second side cover 14, and the end of the return gas section 21 is located on the side of the first side cover 12. This allows the ejection connection end 312 and the return gas connection end 213 to be located at opposite ends inside the evaporator cylinder 1, with a considerable distance between them. The refrigerant ejected from the ejection connection end 312 can evaporate fully inside the evaporation chamber 11, resulting in sufficient heat exchange and improved refrigeration efficiency.

[0045] See Figure 1 To facilitate installation, the evaporator also includes a mounting assembly 5. This mounting assembly 5, through its integrated design that fixes the evaporator cylinder 1 on one side, significantly simplifies the installation and disassembly process. Specifically, the mounting assembly 5 includes a mounting plate 51, a bearing 52, and a connecting shaft 53. The mounting plate 51 can be fixed to the outer casing of the beverage cooling device. The mounting plate 51 has a first mounting hole 511. The outer ring of the bearing 52 is fixed within the first mounting hole 511. One end of the connecting shaft 53 is fixed to the inner ring of the bearing 52, and the other end of the connecting shaft 53 is connected to the end of the evaporator cylinder 1 opposite to the first side cover 12. During installation, the bearing 52 is first installed in the first mounting hole 511, and then the connecting shaft 53 is connected to the bearing 52. This establishes a connection between the evaporator cylinder 1 and the mounting plate 51, forming an integral structure. This integral structure is then inserted into the outer casing of the beverage cooling device, and the mounting plate 51 is fixed in place to form the connection.

[0046] This invention also discloses a cold drink device (not shown in the accompanying drawings), including an evaporator as described above. The evaporator has an evaporation chamber 11. After the external compressor introduces refrigerant into the external condenser, the refrigerant enters the evaporation cylinder 1 through the connecting pipe 3 for evaporation and refrigeration. During this process, the evaporation cylinder 1 rotates to make ice, and the evaporated refrigerant returns to the compressor through the return pipe 2 to form a cycle. The lubricating oil that enters the evaporator cylinder 1 with the refrigerant will remain inside the evaporator cylinder 1 and collect at the bottom of the evaporator cylinder 1. The evaporator cylinder 1 is equipped with an oil return component 4. When the inlet end of the oil return port moves to the high position, the outlet end of the oil return component 4 can communicate with the gas return section 21. The inlet end of the oil return component 4 is close to the inner wall of the evaporator cylinder 1. The oil return component 4 can rotate with the evaporator cylinder 1. Each time it rotates, the oil return component 4 passes through the bottom of the evaporator cylinder 1 and scrapes up the lubricating oil on the bottom inner wall. When it rotates to the high position, under the action of gravity, the lubricating oil can flow into the gas return section 21 along the oil return component 4, thereby forming an oil return. After repeated rotation and oil scraping, a high-efficiency oil return can be formed, ensuring the normal operation of the compressor and preventing lubricating oil from remaining at the bottom of the evaporator cylinder 1, thus ensuring the heat transfer efficiency of the evaporator. In addition, the oil return component 4 is located inside the evaporator cylinder 1 and does not occupy external space, which can save space, reduce volume, and meet the needs of household cold drink equipment.

[0047] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An evaporator, characterized in that, It includes an evaporator cylinder and a return gas pipe and a connecting pipe connected to the evaporator cylinder, wherein the evaporator cylinder is connected to the return gas pipe and the connecting pipe respectively; The evaporator is provided with an evaporation chamber. The return gas pipe is connected to an external compressor. The return gas section of the return gas pipe is connected to the evaporator and communicates with the evaporation chamber. The connecting pipe is connected to an external condenser or throttling device. The spray section of the connecting pipe is connected to the return gas section and communicates with the evaporation chamber. The evaporator is equipped with an oil return component. The outlet end of the oil return component can communicate with the gas return section, and the inlet end of the oil return component is close to the inner wall of the evaporator. The oil return component can rotate with the evaporator.

2. The evaporator according to claim 1, characterized in that, The outlet end of the oil return component is located in the middle of the end of the evaporator cylinder, and the inlet end of the oil return component is located on the peripheral edge of the end of the evaporator cylinder.

3. The evaporator according to claim 1, characterized in that, The side wall of the return gas section is provided with a return gas hole, all or part of which is located in the evaporation chamber. The oil return component is located on the side of the return gas hole, and the outlet end of the oil return component can communicate with the return gas hole.

4. The evaporator according to claim 1, characterized in that, One end of the evaporator is provided with a first side cover, which can rotate with the evaporator. The outlet end of the oil return component is located in the middle of the first side cover, and the inlet end of the oil return component is located on the peripheral edge of the first side cover. The oil return component can rotate with the first side cover.

5. The evaporator according to claim 4, characterized in that, The oil return component has an oil collection groove on one side. The oil return component has a hook-shaped groove at one end located on the peripheral edge of the first side cover. The hook-shaped groove extends outward from the side of the oil return component and forms a "7"-shaped or arc-shaped concave structure at the end. The hook-shaped groove is connected to the oil collection groove. When the first side cover rotates, the hook-shaped groove can scoop compressor oil into the oil collection groove.

6. The evaporator according to claim 5, characterized in that, When the evaporator drives the oil return component to rotate, one end of the oil return component located in the middle of the first side cover can correspond to the position of the air return hole, and the end of the oil collection groove can communicate with the air return hole.

7. The evaporator according to claim 5, characterized in that, The first side cover is also provided with a side fixing platform, which protrudes from the side of the first side cover and surrounds the periphery of the return air pipe. A clearance groove is provided on one side of the side fixing platform, and the position of the clearance groove corresponds to the position of the return air hole. One end of the oil return component located in the middle of the first side cover is provided in the clearance groove or on the side of the clearance groove. The oil collection groove can communicate with the clearance groove.

8. The evaporator according to claim 1, characterized in that, Both the ejection section and the return section are inserted into the evaporation chamber, with the ejection section located within the return section, and the return section being slidably and sealingly connected to the first side cover.

9. The evaporator according to claim 8, characterized in that, The ejection section includes an ejection connection end and an ejection communication end located in the evaporation chamber. The return gas section includes a return gas connection end and a return gas communication end located in the evaporation chamber. The ejection connection end is fixed to the return gas connection end, and the ejection communication end passes through the return gas section and is connected to the return gas connection end.

10. The evaporator according to claim 9, characterized in that, The return gas pipe also includes a support section, one end of which is connected to an external compressor, and the other end of which is connected to the side of the return gas connection end. Part of the connecting pipe is spirally wound in the support section, and the ejection connection end enters the return gas section from the end of the return gas connection end.

11. The evaporator according to claim 9, characterized in that, The end of the return gas connection is provided with a cap, the ejection connection passes through the cap from the return gas section and communicates with the evaporation chamber, and the ejection connection extends from the middle of the evaporation cylinder toward the side wall of the evaporation cylinder.

12. The evaporator according to claim 4, characterized in that, The evaporator also includes a mounting assembly, which includes a mounting plate, a bearing, and a connecting shaft. The mounting plate has a first mounting hole, the outer ring of the bearing is fixed in the first mounting hole, one end of the connecting shaft is fixed to the inner ring of the bearing, and the other end of the connecting shaft is connected to the end of the evaporator cylinder opposite to the first side cover. The mounting plate can be fixed to the outer shell of the cold drink equipment.

13. The evaporator according to claim 12, characterized in that, The evaporator also includes a second side cover, which is located at one end of the evaporator opposite to the first side cover. The ejection section and the return section both pass through the first side cover and are located inside the evaporation chamber. The end of the ejection section is located on the side of the second side cover, and the end of the return section is located on the side of the first side cover.

14. A cold drink equipment, characterized in that, Includes the evaporator as described in any one of claims 1-13.

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